Market Failure Research Paper Essay

The following are some ideas to help you pick a topic for the Market Failure Research Paper assignment. Consult with your instructor if you are having trouble picking a topic. What are some areas where the MARKET fails to give us adequate quantity of output and desirable price (A) Public Goods and Service — Schools, Highways and Streets, Fire and Police Protection, National Defense, Prisons (B) Industries that Need to be Regulated — Utilities, Airlines, Banks — As our economy changes what other industries also need to be regulated or de-regulated? (C) Externalities — Companies produce some type of external cost that affects the community. The company would not voluntarily reduce or eliminate this cost unless the government required them to do so. (These could also be benefits that would add to community but not benefit the company in any way.) (D) Income Inequality — Minimum Wage, Welfare Programs, Unemployment Benefits, Social Security, Medicaid — Areas where our society is becoming more socialized. Assignment: Pick one market in which the price system does not produce an equitable price and quantity of output. Write a paper of 250 words minimum discussion with at least (2) sources cited in the MLA format. Include in your discussion: (1) What action has our government taken in order to provide this good or service in an equitable fashion? (2) What are the alternatives to government intervention? (3) What has been the end result of government intervention? The rise in direct tax has the effect of reducing the post-tax income of those in work because for each hour of work taken the total net income is now lower. This might encourage the individual to work more hours to maintain his/her target income. Conversely, the effect might be to encourage less work since the higher tax might act as a disincentive to work. Of course many workers have little flexibility in the hours that they work. They will be contracted to work a certain number of hours, and changes in direct tax rates will not alter that. The government has introduced a lower starting rate of income tax for lower  income earners. This is designed to provide an incentive for people to work extra hours and keep more of what they earn. Changes to the tax and benefit system also seek to reduce the risk of the ‘poverty trap’ – where households on low incomes see little net financial benefit from supplying extra hours of their labor. If tax and benefit reforms can improve incentives and lead to an increase in the labor supply, this will help to reduce the equilibrium rate of unemployment (the NAIRU) and thereby increase the economy’s non-inflationary growth rate. Changes to indirect taxes in particular can have an effect on the pattern of demand for goods and services. For example, the rising value of duty on cigarettes and alcohol is designed to cause a substitution effect among consumers and thereby reduce the demand for what are perceived as â€Å"de-merit goods†. In contrast, a government financial subsidy to producers has the effect of reducing their costs of production, lowering the market price and encouraging an expansion of demand. The use of indirect taxation and subsidies is often justified on the grounds of instances of market failure. But there might also be a justification based on achieving a more equitable allocation of resources – e.g. providing basic state health care free at the point of use. Lower rates of corporation tax and other business taxes can stimulate an increase in business fixed capital investment spending. If planned investment increases, the nation’s capital stock can rise and the capital stock per worker employed can rise. The government might also use tax allowances to stimulate increases in research and development and encourage more business start-ups. A favorable tax regime could also be attractive to inflows of foreign direct investment – a stimulus to the economy that might benefit both aggregate demand and supply. The Irish economy is often touted as an example of how substantial cuts in the rate of corporation tax can act as a magnet for large amounts of inward investment. The very low rates of company tax have been influential  although it is not the only factor that has underpinned the sensational rates of economic growth enjoyed by the Irish economy over the last fifteen years. Capital investment should not be seen solely in terms of the purchase of new machines. Changes to the tax system and specific areas of government spending might also be used to stimulate investment in technology, innovation, the skills of the labor force and social infrastructure. A good example of this might be a substantial increase in real spending on the transport infrastructure. Improvements in our transport system would add directly to aggregate demand, but would also provide a boost to productivity and competitiveness. Similarly increases in capital spending in education would have feedback effects in the long term on the supply-side of the economy.

Hul and Nirma Company Full Year of Comparison Essay

The success of Nirma’s umbrella branding strategy has led to a change in the competition’s marketing strategies, as well. Many of Nirma’s competitors are now consolidating their brand portfolio and consequently gaining more bang for their advertising rupee. In a changing market environment, the company has relaunched Nirma Yellow Washing Powder and Nirma Beauty Soap, two of its strongest brands. Nirma Yellow Powder is being re-launched with improved formulation and new advertising. This is an extension of the original ad which will return after the launch is over. Nirma Beauty Soap is being re-launched with a new shape, fragrance and a smarter, brighter pack to improve shelf visibility. Promotion Nirma’s success is synonymous with its advertising and marketing strategy. When Karsanbhai Patel started selling his detergent powder, he decided to call it Nirma, derived from the name of his daughter Nirupama. In the early years, the Nirma packet featured a lady washing a garment. Later, however, the design was changed and an image of his daughter was featured on the pack. The white dancing girl, featured in Nirma’s television advertising, is perhaps the most enduring image of Nirma. Though Ms. Patel passed away in a car accident, she continues to live on in the corporate logo and the best selling brands of the company. Nirma’s advertising has always focused on the value-for-money angle. Its simple and catchy jingle – Dudh si safedi Nirma se aye, rangin kapda bhi khil khil jaye – has continued to echo in the drawing rooms of middle-class Indian homes through the decades. While the jingle stresses on the product, it also salutes the savvy and budget-conscious Indian housewife. The jingle, which was first aired on radio in 1975, was broadcast on television in 1982. It is one of the longest running jingles and the spot has seen very few changes since the time it was first aired. For the re-launch of Nirma, the company has developed new spots but they are variations of the old favourite. Once the re-launch is complete, the company plans to go back to the original advertisement. Nirma’s promotion strategy, too, has many firsts to its credit. The company pioneered product sponsorship through the electronic media. Besides, the company has developed a unique advertising strategy – new products are launched with no advertising support. Once the distribution glitches are sorted out and the product reaches the shelves of retailers, the company begins to advertise it. The umbrella branding strategy helps to give new products instant recall without increasing the advertising expense.

Child Sleep Training Essay Example | Topics and Well Written Essays - 1000 words

Child Sleep Training - Essay Example And if the baby just goes along with the flow and does not cry as much, this baby is regarded as a good baby, as he is very compliant. Though parents absolutely love a baby that does not give them trouble and sleeps through the night, sleep training is detrimental to the emotional and physical development of an infant. When a baby is sleep trained, he is kept to a very regimented schedule with very few deviations. He is to sleep and eat at certain times of the day, as everything is governed by a clock. When a clock says a certain time, the baby has to do the task that is to be done at that time, and this includes sleeping, as everything goes hand in hand with the sleep training process. An excerpt from Fleiss' book titled, "Mistaken Approaches to Night Waking," describes the sleep training process in great detail. The article states that babies must be put to bed at the same time for naps and at night, and the parent is not to go in and comfort the baby if he should cry. The baby is to be conditioned to learn to self sooth. He will cry himself to sleep until he realizes that bedtime is bedtime and that the parents will not be coming back into the room. Despite how loud and frantic the baby's cries become, they are to be ignored. Eventually, the baby will stop crying and will give up and go to slee p. If the baby wakes in the night, its cries are to be handled the same way. Parents can make a brief visit to the baby's room to see that he is okay and comfort him verbally if they'd like, but there is to be no eye contact or cuddling. Then, they leave the baby's room, even if the baby is still crying. They can come back five minutes later and then leave again. They can repeat this process again at ten minutes, fifteen, and twenty: however, under no circumstances are they to pick up the baby. Eventually the baby will give up crying and fall asleep, as severe fatigue and exhaustion has overcome him (Fleiss, M.D., M.P.H., F.A.A.P.). There is no doubt that this type of conditioning has detrimental psychological effects on the baby. For instance, let's say that he woke in the middle of the night due to having a bad dream. Despite needing his parents comfort, it is not given to him, as comforting and cuddling the child, despite the reason for needing it, would interfere with the child' s training. The article goes on to say that eventually, the baby becomes so trained that he is reluctant to call or cry out to his parents for help in the middle of the night, even if the help is badly needed. No matter how scared the child is, he will remain silent, forced to deal with his trauma all on his own because h has been taught that bothering his parents is a cardinal sin. He does not receive the reassurance that he so badly needs. While some children are resilient and can do fine when they grow up, sleep training has caused numerous adults to grow up feeling insecure. This is because they were never responded to when they were infants (Fleiss, M.D., M.P.H., F.A.A.P.). In the first stage of human development, Eric Erickson states that the infant is learning how to distinguish trust versus mistrust. The infant develops trust when he realizes that his carers will supply all his needs and keep him safe. One article that discusses the stages of development in detail states that during the first stage of development, it is critical that a parent or carer meets a baby's every need and responds quickly. When the baby is responded to quickly and all of his needs

Critically discuss why Knowledge of the prevailing conditions in the Essay

Critically discuss why Knowledge of the prevailing conditions in the labour market is fundamental to the Human Resource Plann - Essay Example Human resource planning involves identifying the forecasts of labour demand and labour supply in the market. Some of the techniques that can be utilized in forecasting the labour requirement in the organisation include sales projections, managerial estimates, simulations and analysis of employee turnover in the organisation (Briscoe 2008). The human resource managers can utilize succession charts, labour market analysis, personnel ratios and skills inventories in forecasting the labour availability (Reddy 2005). This process is geared at ensuring that there is an adequate number of qualified persons at all the time to perform the jobs that aim at meeting the organisational objectives. Kleynhans asserts that â€Å"human resource planning is depended on the labour market outlook† (2006 p 69). Organisations are currently monitoring the skills in the labour market, the skills shortage and changing trends (Briscoe 2008). Some of the objective of human resource planning process is t o ensure there is enough manpower and proper utilization of manpower in the organisation (Dawra 2003). The process should forecast the future requirements of the human resources at all skills levels in the organisation and access the shortage or surplus at different periods. Another objective is to analyze the impact of changing work processes and technology on the human resource requirements and maximize the return on investment in the people resources. Since employees retire, resign or die, human resource planning process helps the organisation deal with employee turnover and meets both short term and long term people requirements in the organisation (Pattanayak 2005). Some factors that influence the process include the organisational business strategies, growth cycles, and time horizons, quality of human requirement forecasting information, environmental uncertainties and the nature of jobs in the organisation. Human resource planning will anticipate the redundancies, the recruit ment levels and determine the training needs in the organisation (Dawra 2003). Some commonly used methods of labour requirement forecasting include managerial judgments, work study methods, ratio-trend analysis and mathematical models (Reddy 2005). Labour supply in the organisation can be either internal or external. Internal sources of labour supply include promotions, job rotations and training the existing employees on new roles. External sources include the external labour market whereby employees can be employed from educational institutions, referrals and outsourcing (Pattanayak, 2005). Reviewing the human resource audits and making future projections can be utilized to understand the internal human resource supply (Reddy 2005). The internal human resource requirements can be affected by temporal absences, turnovers such as dismissals and resignations and also permanent absences such as death, retirements and disability (Mathis and Jackson, 2012). The simplest method of foreca sting the future human resource supply is the trend analysis that assumes that ratios of employee turnover and movements will be stable in the future. The labour patterns include retirement patterns and hiring patterns that assume the same patterns will remain stable and thus predict the future manpower requirements of the organisation. Another model of forecasting the

Environmental Scanning Assignment Essay Example | Topics and Well Written Essays - 250 words - 4

Environmental Scanning Assignment - Essay Example The problem affects the consumer since the consumer is no longer aware whether the apple products are original or copied from Samsung. Apple needs to have good expertise and prominent lawyers to defend this court case (Gershman, 2014 April 30). The ongoing case has had a bad image to the clients of the business. In order to maintain the customer loyalty there should be proper measures put in place. These measures may include a campaign to convince the customers that they have the unique products and that Samsung is guilty of coping their product. Samsung has sued apple for coping two of its rights and is seeking seven million dollars as compensation. Apple is seeking compensation of 2.2 million dollars compensation from Samsung for coping six of their rights (Gershman, 2014 April 30). In conclusion, this case does not have any benefits to the Apple Company. It has negative effects as the customers begin to doubt the credibility of the Apple products if by any chance they lose the case. The fall in profits is an indication of the negative impacts of the problem at hand. There is also the problem of embarrassment to the Apple Company when Samsung accuses them that they are not the

Summarizing and explaining the data Essay Example | Topics and Well Written Essays - 750 words - 1

Summarizing and explaining the data - Essay Example I resembled too with my class males in extroversion but three points above the females of my class. It gave the thought that female class students were lesser aware of the outer social environment than the males who had greater adaptability to intimate with the outer environment. However, the scores in quirkiness declared all students the same. They had similar levels of oddity attached to their minds and personalities. In aspects of conscientiousness and agree-ability, my classmates were three points below than me. Above all, my scores in these important aspects were closer to the national students’ averages (Sharma). In comparative analysis, the next step is to compare results with respect to gender. The results articulate that the scores are almost the similar of class males and of the national male students altogether. A slightest difference is in the openness factor where the class males are slightly above (two points above) than the national male students. Similarly, the scores of our class females are almost the same to the national scores of females. A slightest difference is in the extroversion factor where class females are two points below than the national females. The results assert that class males are more open-minded than national males and class females are less extroverted than national females. This is the only major projection of difference found in the scores, a difference which is also identified in the average curve graph. Moreover, the results depict that class males are more extroverted than national males, which is another noticing factor. Overall, the average scores of c lass males and class females stand out the same-close to each other, which shows that there is no such significant difference found in scores with respect to gender. Furthermore, the results depicted high scores in agreeability and low scores in quirkiness with respect

Recharch in business Essay Example | Topics and Well Written Essays - 1500 words

Recharch in business - Essay Example In general these people are called or considered as leaders within their particular field of operation. The term leadership simply means the method of influencing a group of people & guiding them towards the accomplishment of a common objective. Our present topic of discussion is the effect of leadership within a workplace and its application within the management of an organization. Generally the organizations get highly benefitted by the implementation of proper leadership approaches as it results in improved quality of goods & services produced by the organization (Maslanka, 2004). What is leadership? Leadership refers to the way by which an individual organizes a group of people so as to achieve a common goal. Leadership is a process of social influence in which an individual attempts to gain the support and help of a group of people to accomplish a common goal (Northouse, 2010, p.4). â€Å"Effective leadership is not about making speeches or being liked; leadership is defined b y results not attributes†-Peter Drucker (RAUP, 2012). â€Å"A leader is one who knows the way, goes the way, and shows the way†- John C. Maxwell (Akbarzadeh, 2011, p. 123). ... A leader must be reliable, and must be able to offer trust and confidence to his or her followers. A leader must be able to communicate to his or her followers clearly and efficiently. Proper supervision is essential. A leader must be modest, helpful and co-operative as because he or she have to lead a team of followers. Dictatorship is an important characteristic of a leader, but it needs to be fair and just. Overconfidence and ruling attitude has a negative impact. A leader must be capable of handling responsibilities and take strategic decisions as per requirement (Maxwell, n.d). Leadership styles 1. Transformational Style- in this style the leader guides and transforms the staff. The leader makes continuous efforts to address the grievances of the employees and motivate them for improved performance. Here open communication between the staff and the leader is always encouraged and the leader follows participative style of management. The staff gets highly influenced by the leader in Transformational Leadership Style. (Lai, 2011) 2. Transactional Style- Here the main focus of the leader is on management’s objectives. In this style the leader constantly motivate his followers by offering rewards for completed tasks. These leaders are mostly work oriented; they usually follow a particular structure and practice directive style of management. In this style of management, innovativeness and creativity are ignored and people are often motivated by the use of extrinsic motivational factors like incentive and holiday trip (Hood, 2007, p.16) 3. Laissez-faire Style- This is also termed as Passive Leadership which exercises least control on the staff. The managers avoid the responsibility of setting objectives and

Public Service Broadcasting Essay Example | Topics and Well Written Essays - 3000 words

Public Service Broadcasting - Essay Example This essay stresses that globalisation has entailed a larger involvement of private enterprises in global media, both in the western democracies as well as in emerging economies like China. Private involvement necessarily results in a higher concentration in the media industry, thereby the media representing a narrow class interest and not that of portraying the national interest. This paper makes a conclusion that television journalists have taken to the production of analytical documentary making with a great vigor particularly in the modern period of globalization and political uncertainties. As a result, the rigid framework of PSBs that typically catered to national political interests cannot be followed. Greater openness and freedom on content have provided journalists to test uncharted waters. In the process, the researchers for the documentary went back in history to understand the link between the current incidents and the past record of the US military establishments in fueling illusions. Such bold statements, equating the War on Terror with the Cold War, could not perhaps be possible to be voiced on the BBC a decade back, when the television in the UK was more controlled and functioning like a duopoly hence following PSB guidelines was easier. The opening up of television, the multi-channel framework and the entry of cable television has altered the ballgame entirely. There has been a tendency of trivializing content on television to grab eyeballs in the both the government controlled as well as private channels. Yet, these documentaries have attracted much controversy and criticism from within the industry. There are accused of staging events and faking images, often camouflaged as the reality.

Nazism vs. Fascism Essay Example for Free

Nazism vs. Fascism Essay R.Q.: To what extent were the German and Italian regimes under Hitler and Mussolini Totalitarian? i. Why? With this research I want to discover whether Hitler and Mussolini transformed Germany and Italy, respectively into Totalitarian regimes. In my discretion this played a major role when looking at traditions, respectability of countries and reputations of countries. Such emotions can also trigger wars, as we so in WWII. Initially, I feel that Dictatorships having absolute power over a country can cause many inconveniences for the citizens of it. Hence, I want to understand their motives and ambitions. Also, I figure that this is a very important time period in which milestones and new dimensions have been opened. Thirdly, I decided on this topic because I am a German citizen, who is naturally interested in the background and history of ones father country. ii. What? I am going to use a series of books written in different time periods by different writers from different countries. This shows a certain scope of viewpoints, which makes the answer to this question more objective. I am also going to use the Internet as one research option of my internal assessment. iii. I planned my essay. This can be seen in the appendix, 1) Essay Plan. This plan shows how I am going to attempt to accomplish my Task i. Define Nazism a. Nazism is the body of political and economic doctrines held and put into effect by the National Socialist German Workers Party in the Third Reich including the totalitarian principle of government, state control of all industries, predominance of groups assumed to be racially superior, and supremacy of the Fà ¯Ã‚ ¿Ã‚ ½hrer1. ii. Define Fascism a. Fascism is a political philosophy, movement, or regime (as that of the Fascisti) that exalts nation and often race above the individual and that stands for a centralized autocratic government headed by a dictatorial leader, severe economic and social regimentation, and forcible suppression of opposition2. iii. Define Totalitarian a. Totalitarian is defined as of or relating to centralized control by an autocratic leader or hierarchy. Of or relating to a political regime based on subordination of the individual to the state and strict control of all aspects of the life and productive capacity of the nation especially by coercive measures (as censorship and terrorism)3 iv. All these definitions above are essential in order to understand how totalitarianism is initially linked with Nazism and Fascism. These terms, Nazism Fascism and Totalitarianism have all got the subordination of the individual to the state and the control of mind etc. of the individual in common. The difference between them, however is that Totalitarian is purely a term describing a situation, a current state of something. Nazism and Fascism on the other hand, describe an ideology that developed over centuries and eventually ruled a country. When we are looking at these definitions, we discover, that both ideologies have a feature of totalitarianism innate. Therefore, initially we would say that they the states, Germany and Italy, both are totalitarian because the autocracy by which they are ruled is totalitarian. This must mean that the people believe in it because they elected this system of government, and hence the system must be totalitarian. This, however, is debatable. In the ongoing lines I will question the above statement by looking closer at the two ideologies and how they became elected. i. Discrimination of Minorities a. Germany i. Minorities, such as Jews, Blacks, Gypsies and women were discriminated widely. Anything not of Aryan derivation, was inferior. Women, for example, were expected to behave just like K,K,K-meaning Kinder, Kirche, Kà ¯Ã‚ ¿Ã‚ ½che. Translated, Children, Church, Kitchen. In other words, they were expected to have as many children as possible to expand the Aryan race, support the religion and cook well. Jews, of course, were treated the worst, i.e.: concentration camps. b. Italy i. Fascist Policy towards women was condescending. Women were not put equal to men. It was also anti-urban and anti-consumerist. There was birth control and additional taxes on unmarried. This, in a way, was similar to Nazi Germany, where there were incentives to bear as many children as possible. It aimed to promote the superior race. Fascist policy was at the beginning not racially concerned. However, when relations with Germany improved, Mussolini adopted some anti-foreign steps. This aimed to give the people a feeling of superiority over other nations and should promote the will to fight for the cause of the nation. Employment conditions for female workers were restricted. They were excluded from several workplaces. ii. Church a. Germany i. Germany was almost entirely a Christian country. Hitler realised this and did not underestimate the power the church, as a single institution, could have on the peoples minds. Therefore, he knew it would not be wise to attack the church during his campaigns. Hence, he made an agreement with the church, the Concordat, which granted the church religious freedom. This, however was only superficially. In reality, any member of the church speaking bad about Hitler or his party, NSDAP, was prosecuted or sent to a concentration camp. Even Church schools were influenced by Hitler; the bible was replaced by Mein Kampf and the cross by the swastika. b. Italy i. In Italy the church played a more important role than in Germany because of the Pope and the Vatican being situated in Italy. Hence, Mussolini tried, after 1922 when coming to power, to include the church as much as possible in the fascist state in order to stabilise and ensure power for his party, PNF. Catholicism was also seen as a possible threat to the emerging fascist state. Hence, a concordat was attempted to improve church-state relations. Catholicism was considered the religion of most Italians, which was so deeply rooted in Italian life that could directly endanger the position of the fascist might. iii. Education a. Germany i. Education in Germany was largely controlled by the Nazis. The main subjects were history, biology and physical education. All of course indoctrinated and altered to shine a good light on the Nazi party and its style of rule. Special schools were build for the most talented. This meant that from a very young age onwards, children in Germany were focused on the Nazi ideology, similar to the Youths, which I will talk about in the next paragraph. b. Italy i. Education was focused on Fascist ideas and ideology. Children were educated in physical education and military training. These are just examples to illustrate what Mussolini wanted to achieve. iv. Youths a. Germany i. Various youths existed in Nazi Germany, all aiming to control the mind of German children. Hitler once described his views concerning the purpose of youths: When an opponent declares, I will not come your side, I calmly say: Your child belongs to us alreadyIn a short time, they will know nothing else but this community. These programs existed for boys and girls. Boys camps were more physical, preparing for war. Girls camps were aiming to make them strong to bear many healthy children. b. Italy i. From 1929 onwards, Mussolini focused more intensely on the control of children in his regime. He wanted to control them by education, which he stated as a right of the leading body in a totalitarian state. The Ministry of Public Instructions was changed to the Ministry of National education (ONB) in 1929. This new organisation provided pre-military training, drill and gym. All measures to convey a more aggressive and disciplined way of live. This program was even integrated into the school curriculum. Recruitment was thus made very easy and numerous. The Fascists wanted to create an Italy were there were young courageous men willing to fight for the cause of the nation. Their motto was: Believe, Obey, Fight. This displays exactly what Mussolini was after. Especially during the great depression, Mussolini tried to give his people a cause to believe in. He created groups or fixed mass meeting so that the people would experience a way of unity. v. Propaganda a. Germany i. Minister of Propaganda in Nazi Germany was Goebbels. He was an able man, with enormous aims. Not only wanted he the people to accept the regime. He wanted them to capitulate to them, grasping the ideology. He, for the first time in history, effectively made use of the radio and press. He seized control over both. By 1932 less then 25% of the population owned a radio. Hence, he made provisions for producing cheap sets of wireless radios. He called it the Volksempfà ¯Ã‚ ¿Ã‚ ½nger, translated, nation-receptionist. The press seemed harder to control. The Nazi publisher-Eher Verlag-bought many of the 4,700 existing newspapers. Goebbels held a daily press conference and eventually, the Editors Law, made the seizure of the press complete. Via the radio, the Aryan race was emphasized. Jewish music was not played. People were constantly bombed with Nazi propaganda, their ideology. b. Italy i. Mussolini wanted to create an image of the new Italian. This image should be aggressive and patriotic. He also used heroic figurers from the wars to illustrate the alleged superiority of the Italian nation. vi. Police State a. Germany i. The party seemed to be well organized and structured. Hitler himself, however, rejected any document work. Now the question appears, how it was so sufficient? The answer is that a powerful force was acting behind the scenes. This force was the army. It consisted of the SS, short for Schutz-Staffel, the SA, short for Sturm-Abteilung, the Gestapo, known for its brutality and later the SD, Sicherheitsdienst, the party internal police force. All these acted in order to maintain or restore order. The SS was once created to be Hitlers personal bodyguard. It evolved to be a unit with incredible power over, economic, political and social matters. It turned out to be an extremely useful tool for Hitler. b. Italy i. The military was also guaranteed a supreme status in Italy. However, the German army had become a political power whereas the Italian had not. After the death of Hindenburg, Hitler was able to benefit from an exclusive oath. Mussolini never had such an opportunity under the still existing Monarchy. The Italian Military acted with divided loyalties. The Italian army did not face any threats form party-army-type organizations, as opposed to the German SS and SA. vii. Power of the Leader a. Germany/Italy i. Both, der Fà ¯Ã‚ ¿Ã‚ ½hrer and il duce, were charismatic and ambitious men. They had a set aim which they wanted to achieve no matter what the cost was. They managed to elate masses so that they would virtually believe anything they said. These are, among others, characteristics a strong Leader must have in order to be successful. Hitler was not only appointed chancellor but became President after Hindenburgs death. He also appointed himself Chief-Commander of all armed forces. This gave him the mere control over many bodies. i. Weigh factors against each other a. Germany vs. Italy ii. Conclusion a. When looking back at my research and all the information I collected during it, I think it is fair to say that both ideologies and those implementing it, transformed the respective countries to a large extent into totalitarian regimes. Although, I would say that this phenomena did not occur in the conventional way. By definition, a totalitarian regime controls every aspect of life. When looking at the moment they came to power and the day they left, a great difference in many senses can be seen. Especially, when looking at how they controlled the peoples minds. Propaganda, Force, Speeches, youths and discrimination are all factors, which increased their influence. This integrated so quickly into the respective countries roots, so that it was inevitable that people would eventually believe what they heard. They would also obey by it because they the how brutal their measures could be. Power conveyed and achieved by force was one feature in these regimes. The other means was propaganda. New technology, new innovations enabled them to convey their messages and slogans whenever they wanted. They could also reach every member of their community. They not only controlled adults. One of their ideas was to transform the young so that their ideology would be carried further with the next generation. 1 http://www.m-w.com/cgi-bin/dictionary?book=Dictionaryva=Nazism 2 http://www.m-w.com/cgi-bin/dictionary?book=Dictionaryva=fascism 3 http://www.m-w.com/cgi-bin/dictionary?book=Dictionaryva=totalitarian

The media plays Essay Example for Free

The media plays Essay The media plays a major role in relation to womens football and womens sport as a whole. In fact the media is most probably the main culprit behind the small amount of interest generated in women sports. In as early as the 1980s is was included in a federal report which presented a set of figures which demonstrated that the media is almost solely concerned with mens sport. Another form of media, a survey in 1980 revealed that only two percent of reportage was devoted to women in sport, this figure however decreased in 1984 to just 1. 3 percent. In terms of photographic articles, photographs of males in sport were thirteen times as much as of females in sport. A large majority of individuals have the opinion that women shouldnt play football as they arent suitable or well equipped. This was promoted by the F.As quote in 1921 when they banned womens football, the game of football is quite unsuitable for females and ought not to be encouraged. This is mainly due to the medias portrayal of the womens game. The medias technique gives more attention to the males sport, it also can create stereotypical views, such as all female shot putters are lesbians. It can affect the way in which female sport players are perceived. This kind of stereotype directly affects the opinion of womens football. Moreover, television both shapes and reflects the attitudes of our society (Messner, M.A. et al). Furthermore it reveals something in terms of womens status in our society. According to Archer and MacDonald, sport is seen as traditionally a masculine preserve. Only a few sports are seen as more feminine sports such as gymnastics and therefore are more accepted by society than sports such as rugby and football which are seen as more masculine sports. Women are often seen as lesbians if they play a more masculine sport. Hargreaves (2000) quoted that because the muscularity and power invested in female sporting bodies inverts the myth of gender by rendering women apparently less feminine and more masculine sportswomen have feared being labelled as lesbians. Hargreaves continues to point out that lesbians themselves face discrimination and barriers in sport, which many have bravely contested. The media can also refer to the stereotype that women should act as a wife and spend their time in the house, and not working. Moreover, in 1988 Chris Evert announced her retirement from sport. This event was seen as so significant that Evert appeared on the cover of Sport Illustrated, something which is rare to a sportswoman. However rather than focussing on her successful career, the magazine framed her retirement with the caption, Im going to be a full time wife. The main point acceptance of womens sport will only occur when womens physicality is associated with traditional, stereotypical beliefs regarding the females body and its proper use-in graceful and aesthetically pleasing ways (Greendorfer, 1990). Moreover, women in sports such as gymnastics and figure skating, which are seen as more feminine, have greater social acceptance and media coverage. If sport is not seen as a feminine pastime, football is even less so. As we are often told, it is a mans game. (Gadgil, A., 2003). This opinion is held by many and is certainly created by medias portrayal of women footballers. The media can also however have a beneficial influence on the perception of women footballer, for instance, the creation of role models. There is a distinct lack of role models in the womens game in the UK; however this is different in America. After the Womens World Cup in 1999 which was set in America, a majority of players in the U.S squad were made households names, made appearances in advertisements and also received sponsorship. A role model is a very important tool in order to attract young females to football. It is a person who is regarded by others as a good example to follow (Collins dictionary 2003). The English equivalent to womens football hasnt created many female role models on the pitch; however, it has seen certain females in a position of authority within football. One early example of women in positions of authority in the males game was Annie Bassett, who became the first senior female Marketing Executive of a professional football club in 1987. Using my previous knowledge there are only a couple of females which come to mind when I think of role models in connection with football. Firstly Kelly Smith, who is currently playing football for England and a team in the U.S, she was the first English female to be transferred to America. The second person who comes to mind is Karren Brady, the first female managing director at a professional club. Sepp Blatter could be correct with his prediction that the future is feminine however there is still a great deal of development needed in the womens game. Females are starting to appear more and more in the male game, however there isnt enough publicity given to them, therefore it is difficult to find a role model. Most of the better known females which could be classed as role models are involved more with mens football rather than womens football, for instance, Wendy Toms the first female football assistant referee in England. The fact that football is so popular worldwide confuses the fact that womens football isnt as popular as the males equivalent. I have already discussed possible reasons why womens football isnt seen in a good light by many individuals, both females and males. Obviously individuals in connection with the womens game want to improve interest, attendance and enthusiasm for the sport, however without using certain decision making techniques and problem solving skills, they may struggle to improve this. I am going to continue to firstly introduce some problem solving tools, and then will go on to try and suggest certain improvements which could be made to the womens game. As I have already addressed some problems which I am faced with in relation to this issue, I am going to further investigate into problem solving. G. Brown and M. Atkins (1988) devised a problem solving technique which involved four stages. Stage one involves identifying and stating the problem, dissecting it and exploring it. The problem that I am addressing is related to why womens football isnt as popular as the men game. I have identified possible reasons behind this in my essay, including the medias influence, the lack of role models, and the bad publicity which female athletes or players receive. The second stage requires me to use previous knowledge of problem and relate it to similar problems. Thirdly I need to devise an approach to try and solve the problem. Finally I need to evaluate my approach. There are many approaches to help to solve a problem. Brainstorming is a good method which usually involves setting a question then in a group deciding on many possible answers. These answers are usually written down without judgement and accuracy. However once enough answers have been brainstormed, they need to be evaluated to see exactly how accurate they may be. For all problem solvers there is a process to follow. Moreover in conjunction with G. Brown and M.Atkins theory, there needs to be certain stages. The problem needs to be firstly recognised, and then defined. Before the problem is analysed there is a need for some decision making, for instance, the desired situation and objective need to be clear. Once this is completed, the problem needs to be analysed, and furthermore possible solutions need to be suggested. Once this has been completed the solution needs to be assessed and evaluated.

Antibody Level After Hepatitis B Vaccination in Hemodialysis

Antibody Level After Hepatitis B Vaccination in Hemodialysis ABSTRACT OBJECTIVE The objective of this study was to determine the antibody level after Hepatitis B vaccination in chronic hemodialysis patients. METHOD: All patients undergoing chronic hemodialysis (HD) at the dialysis unit of Liaquat National Hospital, fulfilling the inclusion and exclusion criteria were enrolled between April 2013 and September 2013, after taking informed consent. AntiHbs (Hepatitis B surface antibody) titers were measured. Patients were differentiated as Immune and nonimmune based on antibody titers, with levels of >10 IU/l being considered as immune and levels of RESULTS: Out of 118 patients enrolled, 103 (87.3%) had an adequate antibody response and were considered immune while only 15 patients (12.7%) had an inadequate antibody response rendering them non immune. AntiHbs titers showed no significant co-relation with gender and duration of Hemodialysis therapy (p>0.05), while age was found to have significant correlation as younger age group ( CONCLUSION: Our study showed a very good Antibody response to Hepatitis B vaccination among hemodialysis patients that correlated with age with younger age group having a better response but no correlation to gender and duration of dialysis. KEYWORDS: Hepatitis B virus, Anti-HBs antibody, Hemodialysis, Prevalence, Vaccination. INTRODUCTION Hepatitis B virus (HBV) infection is a common but avoidable disease. Hepatitis B virus (HBV) is a DNA virus that can be communicated via saliva, body fluids, semen, vaginal fluids, blood products, sexual contacts or prenatally influencing 350-400 million persons round the globe (1-3). In contrast to general population, hemodialysis patients are at higher risk of acquiring Hepatitis B Virus because of direct exposure to blood products, shared hemodialysis devices, needle pricks and hemodialysis process which involve access to blood circulation.(4) Hence, Hemodialysis patients are vulnerable to infections with Hepatitis B Virus and hepatitis C virus (HCV). The prevalence of Hepatitis B Virus in hemodialysis (HD) patients varies significantly between countries, ranging from minimal in developed countries to very high in some developing countries. Despite the fact that many steps have been taken for the prevention of HBV infection like mass vaccination programs, implementation of thoroug h blood donor screening, awareness encouragement programs of erythropoietin use and generalize availability in hemodialysis centers, Hepatitis B Virus infection remains a major concern in Hemodialysis centers majorly in developing countries (5). Patients who are on maintenance hemodialysis are considered as high-risk group, resulting in high incidence and mortality. Therefore, to vaccinate them against the virus is mandatory. Compared to a response rate of over 90% in the normal population, only 50 to 60% of those with end-stage renal disease achieve adequate antibody levels following immunization (6, 7). Various tactics have been employed to overcome the low seroconversion rate like co-administering zinc, gamma-interferon, thymopentin, interleukin-2, and levamisole as immunostimulants or adjuvants as well as changing the injection mode (intradermal versus intramuscular) or doubling the vaccine dose (7, 8). Low immune response to hepatitis B vaccination in patients on HD is noticed in several studies but has never been studied in our population. Therefore our aim is to conduct a study in our population to determine the serum Anti-Hbs levels in these patients following vaccination. MATERIAL METHODS From April 2013 to September 2013, 118 patients undergoing HD in Liaquat National Hospital and Medical College were screened for anti-HBs. A questionnaire was used to collect the demographic data and duration of HD. All patients were included in HD unit who underwent primary vaccination within last one year (four doses: recombinant HB vaccine; 40 ug, i.m, at 0, 1, 2 and 6 months). Exclusion criteria included patients on immunosuppressive drugs, malignancy or HIV positive patients. Enzyme linked immunosorbent assay (ELISA,Biokit, Spain) was used to measure Anti-HBs antibodies titers. The data was analyzed by SPSS  ® for windows ® (version 14.0 Chicago, IL, USA). A p value RESULTS We enrolled total of 118 patients on Hemodialysis who were recently vaccinated. Demographics are shown in Figure 1.Patient’s age ranged from 20-71 years. 46.6 %( N=55) were Male with mean age 53.2  ±10.02 yrs and 53.1 %( N=63) were Females with mean Age of 51.59  ±10.63 yrs. Age was found to have significant impact on Hepatitis B surface antibody titer with patients 0.05). Out of 118 patients, 15 (12.7%) were found to have Inadequate response or Non-immune, where as, 104 (87.3%) had an Adequate response and responded well to the immunization. Duration on Hemodialysis ranges from 1-4 yr with mean duration of 1.97 ±0.77 years, most of the patients had less than 3 years of Hemodialysis 97.5% (N=115/118) and only 3 patients (2.5%) were in year 4. Duration of Hemodialysis failed to show any significant impact on Hepatitis B vaccination response rate (p>0.05). DISCUSSION: An increased risk of exposure to HBV infection is observed in patients on maintenance hemodialysis (9) It has been observed that after vaccination for Hepatitis B, hemodialysis patients develop lower antibody titers compared to healthy individuals, and even if they are immunized, their antibody titers falls shortly within a year(10). The present study showed a very high response to hepatitis-B vaccination among hemodialysis patients. One hundred and four (87.6%) patients showed good antibody response after vaccination. Previous studies in hemodialysis patients have shown a variable hepatitis-B vaccination response rate, ranging from 47%-73%.(11-13).Comparable good results to hepatitis-B vaccination in hemodialysis patients had also been observed in areas with intermediate endemicity (2-8%) prevalence of Hepatitis B Virus ,such as in Brazil , which approached 89.5% in one study.(14) A recent meta-analysis of 17 clinical trials showed decreased response to hepatitis-B vaccination among older dialysis patients(15) which might be attributed to age associated changes to immune status, where â€Å"older† was defined at age 50 yrs. Our patients mean age were 52.3 ±10.04 yrs correlating with Meta analysis age group, and our results are similar with older patients having less immune response.(11, 16, 17) In the present study, gender and duration of hemodialysis therapy did not have any correlation to hepatitis-B vaccination. These results are in agreement with those reported by Peces et al .(18).Dacko et al.(16) and Tele et al(14).Similarly, Roozbeh et al(19) also confirmed the same results and showed that gender did not differ between responders (immune) and non-responders (non-immune) to hepatitis-B vaccination. CONCLUSION: We report a very good response to hepatitis-B vaccination among hemodialysis patients that is neither co-relating with gender or duration of hemodialysis. This was a preliminary study in our population which only estimated the response rate against vaccination. Future studies are needed to determine the impact of nutrional status and adequacy of hemodialysis on the response rate of vaccination as previous studies has shown their influences over titer levels.

Radical Views of Defoe Exposed in Moll Flanders Essay -- Moll Flanders

Radical Views of Defoe Exposed in Moll Flanders      Ã‚  Ã‚  Ã‚   Daniel Defoe is a proponent of the unorthodox in his novel Moll Flanders in which he shapes many aspects of Moll's life after those of his own.   The concepts he puts forth in the work are radically different from beliefs customary to seventeenth century England.   Appealing to and championing the common man, Defoe constructs an iconoclastic piece that praises a common woman.    In spite of gender differences, Moll mirrors Defoe's life.   Defoe draws on his past, when he served time in debtors' prison after his business as a merchant failed.   He traveled to cities where he would become free from his creditors (Monarch Notes).   It is from these experiences that he begins Moll's adventure to survive.   After Moll's second husband, like Defoe, is arrested, Moll takes refuge in the Mint, for if the commissioners were to have been informed where [she] was, [she] should have been fetched up and all [she] had saved be taken away (Defoe 44).  Ã‚      Defoe uses his beliefs on morality, unusual for a man of his time, as a m...

Analysis of Salman Rushdies Midnights Children Essay -- History Nati

Analysis of Salman Rushdie's Midnight's Children Salman Rushdie’s novel Midnight’s Children employs strategies which engage in an exploration of History, Nationalism and Hybridity. This essay will examine three passages from the novel which demonstrate these issues. Furthermore, it will explore why each passage is a good demonstration of these issues, how these issues apply to India in the novel, and how the novel critiques these concepts. The passage from pages 37-38 effectively demonstrates the concept of history, as it foregrounds elements important to this issue. Rushdie, challenges the conventional modes of history through his self reflective narrative structure. The passage is a good demonstration of its topic as it illustrates the problems of re-writing history. His mode of writing attempts to encourage the reader to reconsider the valid interpretation of his history. Saleem writes â€Å"please believe that I am falling apart† ,as he begins â€Å"to crack like an old jug†, illustrating a sense of fragmentation of his story. This parallels the narrative structure of the novel as being circular, discontinuous and digressive. This fragmentation appropriates the concept of history, which was developed by colonisers. History works for a particular class of ideology, and therefore it will be contaminated, oblique and subjective. The ‘fictionality’ of history is grounded in the simple assumption that life is shaped like a story. For Saleem, who is â€Å"buffeted by too much history†, it is his memory which creates his own history. â€Å"Memory, as well as fruit, is being saved from the corruption of the clocks†. This reflects back to concepts of time and place. Yet, for Rushdie, it is not based on the universal empty time that has been conceptualised by the colonisers. Notions of time and space are integrated into his own history. The novel critiques concepts of history by challenging traditional conventions. Rushdie uses unreliable events to subvert official notions of history. For example, in his description of the Amrister Massacre he describes the troops that fire on the crowd as being white, when they were not. He does this perhaps to illustrate how much history is based on interpretation and ideology. It also illustrates how fact (written down as history), fails to take into account different notions of space and time. For example, in the pas... ...s, his biological father is a departing colonist. The passage on page 211 clearly demonstrates Saleem’s hybrid identity. He relates hybridity to history by entailing the hetreogeneity of memory. â€Å"Memory’s truth because memory has its own special kind† . For Saleem, his memory provides a search for the truth, rather than many truths. Saleem links his hybrid history to ‘chutney’ which illustrates the sign of a mixed identity. â€Å"Green chutney on chilli-pakoras† , this imagery of chutney runs throughout the novel and assist Saleem’s story. He later, uses this image to sum up his hybridise culture, which parallels â€Å"the chutnification of history† and â€Å"pickling of time†. Rushdie comments on the colonised mimicking the coloniser. Two histories have emerged together, which is filled with contamination as mimicry becomes a problem as it disrupts the power. This reflects, what Rushdie calls like ‘chutney’, a mixture of history, and nationalism that become so dense and enmeshed that they transform to create a new culture. Rushdie effectively tackles issues of post-colonial studies of history, nationalism and hybridity, and Midnight’s Children illustrates and challenges these concepts.

Nss Phy Book 2 Answer

1 1 2 3 C Motion I 7 (a) From 1 January 2009 to 10 January 2009, the watch runs slower than the actual time by 9 minutes. Therefore, when the actual time is 2:00 pm on 10 January 2009, the time shown on the watch should be 1:51 pm on 10 January 2009. Practice 1. 1 (p. 6) D (a) Possible percentage error 10 ? 6 = ? 100% 24 ? 3600 = 1. 16 ? 10 % 1 (b) = 1 000 000 days 10 ? 6 –9 It would take 1 000 000 days to be in error by 1 s. (b) Percentage error 9 = ? 100% 9 ? 24 ? 60 = 6. 94 ? 10–2% 4 (a) One day = 24 ? 60 ? 60 = 86 400 s Practice 1. 2 (p. 15) 1 2 3 4 5 C B D D (b) One year = 365 ? 86 400 = 31 500 000 s 5 Let t be the period of time recorded by a stop-watch. Percentage error = 0. 4 ? 100% ? 1% t t ? 40 s (a) Total distance she travels 2 ? ? 10 2 ? ? 20 2 ? ? 15 + + = 2 2 2 = 141 m (b) Magnitude of total displacement = 10 ? 2 + 20 ? 2 + 15 ? 2 = 90 m Direction: east Her total displacement is 90 m east. The minimum period of time is 40 s. 6 (a) Percentage error error due to reaction time = ? 100% time measured 0. 3 = ? 100% 10 = 3% 6 7 His total displacement is 0. With the notation in the figure below. (b) From (a), the percentage error of a short time interval (e. g. 10 s) measured by a stop-watch is very large. Since the time intervals of 110-m hurdles are very short in the Olympic Games, stop-watches are not used to avoid large percentage errors. Since ZX = ZY = 1 m, ? = ? = 60 °. Therefore, XY = ZX = ZY = 1 m The magnitude of the displacement of the ball is 1 m.  © 8 (a) The distance travelled by the ball will be longer if it takes a curved path. 7 (a) Length of the path = 0. 8 ? 120 = 96 m (b) No matter which path the ball takes, its displacement remains the same. (b) Length of AB along the dotted line 96 = 30. 6 m = (c) Magnitude of Jack’s average velocity 30. 6 ? 2 = = 0. 51 m s–1 120 Practice 1. 3 (p. 23) 1 B Total time 5000 5000 = + = 9821 s 1. 4 0. 8 5000 + 5000 = 1. 02 m s–1 Average speed = 9821 Practice 1. 4 (p. 31) 1 2 C B Final speed = 1. 5 ? 1 – 0. 2 ? 1 = 1. 3 m s–1 2 C Total time = 9821 + 10 ? 60 =10 421 s 5000 + 5000 Average speed = = 0. 96 m s–1 10 421 3 A By a = 3 D When the spacecraft had just finished 1 revolution, the spacecraft returned to its starting point. Therefore, its displacement was zero and its average velocity was also zero. v ? u , t v = u + at 36 = + ( ? 1. 5) ? 2 3. 6 = 7 m s–1 = 7 ? 3. 6 km h–1 = 25. 2 km h–1 Its speed after 2 s is 25. 2 km h–1. 4 5 D (a) Average speed 100 = = 10. m s–1 9. 69 (b) Yes. This is because the magnitude of the displacement is equal to the distance in this case. 4 B Take the direction of the original path as positive. Average acceleration of the ball ? 10 ? 17 = 0. 8 = –33. 8 m s–2 The magnitude of the average acceleration of the ball is 33. 8 m s– 2. v ? u By a = , t 100 ? 0 v ? u 3. 6 t= = = 4. 27 s a 6. 5 6 (a) Two cars move with the same speed, e. g. 50 km h–1, but in opposite directions. (b) A man runs around a 400-m playground. When we calculate his average speed, we can take 400 m as the distance and his average speed is non-zero. But since his displacement is zero (he returns to his starting point), his average velocity is zero. 5 The shortest time it takes is 4. 27 s.  © 6 Time / s –1 4 0 2 4 6 17 8 22 D Average speed 80 + 60 = 5 = 28 km h–1 Average velocity = Speed / m s 2 7 12 v ? u 22 ? 2 a= = 2. 5 m s–2 = t 8 The acceleration of the car is 2. 5 m s–2. 7 (a) I will choose ‘towards the left’ as the positive direction. 80 2 + 60 2 5 (b) 5 = 20 km h–1 C Total time 10 10 = + 2 3 = 8. 33 s v ? u , t u = v ? at = 9 ? (? 2) ? 3 = 15 m s–1 –1 (c) By a = Average speed 20 = 8. 33 = 2. 4 m s–1 Her average speed for the whole trip is 2. m s–1. The initial velocity of the skater is 15 m s . 8 (a) The object initially moves towards the left and accelerates towards the left. It will speed up. 6 7 8 9 10 C C C B A Magnitude of displacement = 2000 2 + 6000 2 = 6324. 6 m Magnitude of average velocity 6324. 6 = 4 ? 3600 = 0. 439 m s–1 6000 tan ? = 2000 ? = 71. 6 ° His average velocity is 0. 439 m s–1 (S 71. 6 ° E). (b) The object initially moves towards the right and accelerates towards the left. It will slow down. Its velocity will be zero and then increases in the negative direction (moves towards the left). Revision exercise 1 Multiple-choice (p. 5) 1 2 3 C D B  © 11 C Total time = 13 min = 780 s 840 ? 2 = 2. 15 m s ? 1 Average speed = 780 (b) Displacement from Sheung Shui to Lok Ma Chau 1000 = ? 6. 3 1 = 6300 m Magnitude of average velocity 6300 = 359 = 17. 5 m s–1 (1M) (1A) (1M) (1A) 12 13 D (HKCEE 2003 Paper II Q3) Conventional (p. 37) 1 Total time left for the two players = 4 ? 60 + 9 + 5 ? 60 + 16 = 565 s Total time they have been playing = 2 ? 60 ? 60 ? 565 = 6635 s (= 110 min 35 s = 1 h 50 min 35 s) (1A) 5 (a) Total distance = 1500 + 40 ? 1000 + 10 ? 1000 = 51 500 m Total time = 2 ? 3600 + 3 ? 60 + 8 = 7388 s Average speed 51 500 = 7388 = 6. 7 m s–1 (1M) (1A) 2 (a) 50 m (1A) (b) Ma gnitude of average velocity of Kitty 50 = (1M) 1? 60 + 15 = 0. 667 m s ? 1 (1A) (1M) (1A) (c) Average speed of the coach 5 + 50 + 5 = 1? 60 + 15 = 0. 8 m s ? 1 (b) Swimming: Average speed 1500 = 21 ? 60 + 28 = 1. 16 m s–1 Cycling: Average speed 40 000 = 1 ? 3600 + 1 ? 60 + 53 = 10. 8 m s–1 Running: Average speed 10 000 = 39 ? 60 + 47 = 4. 19 m s–1 (1M) His average speed was the highest in cycling. (1A) 3 (a) Since she measures the time interval based on 1 cycle of the pendulum, the error (0. 3 s) in measuring the cycle of the pendulum accumulates. is from 8 to 14 s. 1A) (1A) The range of the time interval (10 cycles) (b) When finding the time for one pendulum cycle, Jenny should time more pendulum cycles (e. g. 20) with the stop-watch and divide the time by the number of cycles. (1A) 4 (a) Time required 7. 4 ? 1000 = 20. 6 = 359 s (5 min 59 s) (1M) (1A)  © (c) Yes. Since the time interval of this competition is quite long, (1A) using stop-watch will not result in large percentage error as the reaction time for an average person is only 0. 2 s. (1A) (1M) (c) Total time = 5 min 45 s ? 1 min 58 s = 3 min 47 s = 3 ? 60 + 47 = 227 s v? u a= (1M) t 431 ? 0 = 3. = 0. 527 m s–2 (1A) 227 The average acceleration of the train is 0. 527 m s–2. 6 (a) v = u + at =0+6? 4 = 24 m s–1 = 86. 4 km h 86. 4 km h . –1 –1 (1A) The maximum speed of the car is 8 (1M) (a) Total distance = 8000 + 4000 + 5000 = 17 000 m Total time = 1 ? 3600 + 30 ? 60 + 45 ? 60 (b) v = u + at = 24 + (–4) ? 2 = 16 m s –1 –1 = 57. 6 km h (1A) –1 = 8100 s Average speed 17 000 = 8100 = 2. 10 m s–1 (1M) (1A) (c) The final speed of the car is 57. 6 km h . v? u a= (1M) t 16 ? 0 = 6 = 2. 67 m s–2 2. 67 m s–2. (1A) The average acceleration of the car is (b) 7 (a) Average speed 30 000 = 8 ? 60 = 62. m s–1 The average speed of the train is 62. 5 m s–1. (1M) (1A) (b) Maximum speed 430 = = 119. 4 m s? 1 > average speed 3. 6 (1A) The average speed must be smaller than the maximum speed because the train needs to speed up from start and slows down to stop during the trip. (1A) Magnitude of displacement = 3000 2 + 4000 2 = 5000 m Magnitude of average velocity 5000 = = 0. 617 m s–1 8100 4000 tan ? = 3000 (1A) ? = 53. 1 ° His average velocity is 0. 617 m s (N 53. 1 ° E).  © –1 (1A) 9 (a) Distance travelled = 10. 5 ? 3 ? 60 = 1890 m (1M) (1A) 10 (a) Total distance = (120 + 50) ? 1000 = 170 000 m (1M) (1A) b) Circumference of the track =2 r = 2 (400) = 2513 m The distance travelled by Marilyn is 3 1890 m which is about of the 4 circumference. (1A) (b) N ?XYZ is a right-angled triangle. Z ? 50 km 30 ° Y 60 ° X ? ? 120 km Magnitude of displacement (from town X to town Z) = 120 000 2 + 50 000 2 = 130 000 m 120 tan ? = 50 ? = 67. 4 ° Magnitude of displacement AB = 400 2 + 400 2 (1A) (1A) ? = 90 ° ? 67. 4 ° = 22. 6 ° ? = 60 ° ? 22. 6 ° = 37. 4 ° The total displacement of the car is 130 000 m (N 37. 4 ° E). = 566 m Magnitude of average velocity 566 = 3 ? 60 = 3. 14 m s 400 tan ? = 400 ? = 45 ° (S 45 ° E). –1 (c) (1A) Total time 170 000 = = 10 200 s 60 3. 6 Magnitude of average velocity 130 000 = 10 200 = 12. 7 m s–1 Its average velocity is 12. 7 m s (N 37. 4 ° E). –1 (1A) (1A) (1M) (1A) Her average velocity is 3. 14 m s–1  © 11 (a) AC = 60 2 + 80 2 = 100 m 80 tan ? = ? = 53. 1 ° 60 (1M) The total displacement of the athlete is 100 m (S53. 1 °W). (1A) 13 (Correct label of velocity with correct direction (towards the left). ) (Correct label of acceleration with correct direction (towards the right). ) (1A) (1A) (a) The coin moves in the following sequence: B A C C A Therefore, it is at A finally. Displacement of the coin = 15 cm (1A) (1M) (1A) (1M) b) Distance travelled by the coin = 15 + 30 + 30 = 75 cm (b) Time / s v / m s–1 0 –6 1 –4 2 –2 3 0 4 +2 5 +4 6 +6 (1A) (1A) (c) (i) Total time = 2 s ? 4 = 8 s Average velocity 15 ? 10 ? 2 = 8 = 0. 0188 m s? 1 (0. 5A ? 6) (1M) (1A) (c) The car will slow down and its speed will drop to zero. After th at the car will move towards the right with increasing speed (uniform acceleration). (1A) (1M) (1A) (1M) (1A) (1M) (1A) A (ii) Average speed 75 ? 10 ? 2 = 8 = 0. 0938 m s? 1 (1M) (1A) 12 (a) Total distance travelled = 60 + 80 + 80 + 60 = 280 m (d) (i) The coin moves in the following sequence: B A C C A B B b) Magnitude of total displacement = 80 + 80 = 160 m 160 m (west). The total displacement of the athlete is Therefore, it is at B finally. zero. the coin is also zero. (1A) (1M) (1A) (1M) (1A) (1M) (1A) (ii) The displacement of the coin is Therefore the average velocity of (c) Total distance travelled = 280 + 60 + 80 = 420 m 14 (a) Total distance = ? r = 5? ? 60 m C = 15. 7 m Total displacement =5+5 = 10 m 80 m  © The total displacement travelled by her is 10 m. (b) Jane’s statement is incorrect. (1A) Since both girls start at X and meet at Y, they have the same displacement. (1A) Betty’s statement is incorrect. 1A) Since both girls return to their starting point, their displacements are zero. (1A) Physics in articles (p. 40) (a) From 19 January 2006 to 28 February 2007, (1A) It takes New Horizons spacecraft a total of 406 days to travel from the Earth to Jupiter. (1A) (b) (i) Average speed total distance travelled = total time of travel (1M) = 8 ? 108 406 ? 24 (1A) (1M) = 8. 21 ? 104 km h? 1 (ii) Average acceleration change in velocity = total time of travel = (8. 23 ? 5. 79)? 10 4 406 ? 24 = 2. 50 ? 104 km h? 2 (1A) (1A) (c) July 2015  © 2 1 2 3 4 5 Motion II 10 (a) The object moves with a constant elocity. Practice 2. 1 (p. 61) D B D D B 30 ? 10 = 10 m s–1 v= 2 (b) The object moves with a uniform acceleration from rest. (c) The object moves with a uniform deceleration, starting with a certain initial velocity. Its velocity becomes zero finally. The velocity of the car at t = 2 s is 10 m s–1. 6 7 C (d) The object first moves with a uniform acceleration from rest, then at a constant velocity, and finally moves with a smaller uniform acceleration again. (a) Total displacement = 4 ? 5 + (? 5) ? (7 ? 5) = 10 m The total displacement from the staircase to her classroom is 10 m. (e) The object moves at a constant velocity and then suddenly moves at constant velocity of same magnitude in the opposite direction. (b) Classroom C 8 (f) The object moves with uniform deceleration from an initial velocity to rest, and continue to move with the uniform acceleration of the same magnitude in opposite direction. 9 (a) The object accelerates. (b) The object first moves with a constant velocity. Then it becomes stationary and finally moves with a higher constant velocity again. 11 (a) The object moves with zero acceleration (with constant velocity of 50 m s–1). (b) The object moves with a uniform cceleration of 5 m s–2. (c) 12 The object moves with uniform deceleration of 5 m s–2. (c) The object decelerates to rest, and then accelerates in opposite direction to return to its starting point. (a) It moves away from the sensor. (d) The object moves with uniform velocity towards the origin (the zero displacement position), passes the origin, and continues to move away from the origin with the same uniform velocity.  © (b) (c) The greatest rate of change in speed 0 ? 3. 5 = 2 = –1. 75 m s–2 (d) Total distance travelled = area under the graph 3. 5 ? 2 2 ? 6 = + 2 2 = 9. 5 m Practice 2. 2 (p. 71) 1 C By v2 = u2 + 2as, 290 3. 6 2 13 (a) =0+2? 1? s s = 3240 m = 3. 24 km < 3. 5 km The minimum length of the runway is 3. 5 km. 2 B Cyclist X is moving at constant speed. Time for cyclist X to reach finish line displacement 150 = = = 30 s time 5 For cyclist Y: u = 5 m s–1, s = 250 m, (b) Total distance travelled = area under the graph (12 + 6) ? 3 = 2 = 27 m a = 2 m s–2 By s = ut + 1 2 at , 2 1 250 = 5 ? t + ? 2 ? t2 2 (c) Average speed total distance travelled = time taken 27 = 3 t = 13. 5 s or t = ? 18. 5 s (rejected) Y needs 13. 5 s to reach finish line. Therefore, cyclist Y will win the race. 3 B Since the bullet start decelerates after fired into the wall, we could just consider the displacement of the bullet in the wall. To prevent the bullet from penetrating the wall, the bullet must stop in the wall. = 9 m s–1 14 (a) She moves towards the motion sensor. (b) The highest speed of the girl in the journey is 3. 5 m s–1.  © By v2 = u2 + 2as, 0 = 500 + 2 ? (? 800 000) ? s 2 8 By v = u + at, 14 = u + 2 ? 5 u = 4 m s–1 s = 0. 156 m = 15. 6 cm < 15. 8 cm The minimum thickness of the wall is 15. 8 m. By v2 = u2 + 2as, 142 = 42 + 2 ? 2 ? s s = 45 m 4 C When the dog catches the thief at t = 5 s, its total displacement is 30 m. The dog is sitting initially, so u = 0. 1 By s = ut + at2, 2 1 30 = 0 + a(5)2 2 The displacement of the girl is 45 m. 9 (a) v = u + at = 0 + 20 ? 0. 3 = 6 m s? 1 The horizontal speed of the ball travelling towards the goalkeeper is 6 m s? 1. a = 2. 4 m s–2 Its acceleration is 2. 4 m s–2. (b) By v2 = u2 + 2as, 02 ? 62 a= = –22. 5 m s? 2 2 ? 0. 8 The deceleration of the football should be 22. 5 m s? 2. 5 6 D 90 36 ? v? u = 3. 6 3. 6 = 1. 5 m s–2 a= t 10 By v = u + 2as, 2 2 10 (a) The reaction time of the cyclist is 0. 5 s. s= v ? u = 2a 2 2 90 3. 6 36 3. 6 2 ? 1. 5 ? 2 2 = 175 m (b) Braking distance (2. ? 0. 5)? 15 = 11. 25 m = 2 Thinking distance = 15 ? 0. 5 = 7. 5 m Stopping distance = 11. 25 + 7. 5 = 18. 75 m child. 20 m The distance travelled by the motorcycle is 175 m and its acceleration is 1. 5 m s . –2 7 (a) Thinking distance = speed ? reaction time 108 = ? 0. 8 = 24 m 3. 6 Therefore, the bicycle would not hit the (b) Since the car decelerates uniformly, braking distance v+u = ? t 2 108 +0 = 3. 6 ? (3 ? 0. 8) 2 = 33 m 11 By v = u2 + 2as, 0 = 32 + 2 ? (–0. 5) ? s s=9m 8m Therefore, the golf ball can reach the hole. 2 12 (a) (i) By v = u + at, 0 = u + (–4)(4. 75) u = 19 m s–1 The initial velocity of the car is 19 m s–1. (c) Stopping distance = thinking distance + braking distance = 24 + 33 = 57 m  © (ii) By v2 = u2 + 2as, 0 = 19 + 2 ? (–4) ? s s = 45. 1 m 2 3 C For option A, apply equation v2 = u2 – 2gs and take s = 0 (the ball returns to the second floor), v = –u = –10 m s–1 (vertically downwards) The displacement of the car before it stops in front of the traffic light is 45. 1 m. This is the same velocity as the initial velocity of option B. Therefore, in both ways the ball has the same vertical speed when it reaches the ground. (b) By v = u + 2as, 17 = 0 + 2 ? 3 ? s s = 48. 2 m 2 2 2 The displacement of the car between starting from rest and moving at 17 m s is 48. 2 m. –1 4 B Take the upward direction as positive. 1 By s = ut + at2, 2 1 0 = u ? 30 + ? (? 10) ? 302 2 u = 150 m s–1 13 (a) By v2 = u2 + 2as, v2 = 0 + 2 ? 0. 1 ? 500 v = 10 m s–1 His speed is 10 m s . –1 (b) Consider the first section. By v = u + at, v? u t= a 10 ? 0 = 0. 1 = 100 s Consider the second section. 1 By s = ut + at2, 2 1 800 = 10t + ? 0. 5t2 2 t = 40 s or t = –80 s (rejected) The speed of the bullet is 150 m s–1 when it is fired. 5 Speed of stone Equation used t=1s t=2s t=3s t=4s v = u + at Distance travelled by the stone 1 s = ut + at 2 2 m 20 m 45 m 80 m 10 m s–1 20 m s 30 m s –1 –1 40 m s–1 Total time taken = 100 + 40 = 140 s It takes 140 s for Jason to travel downhill. 6 1 By s = ut + at2, 2 1 10 = 0 + (10) t2 2 t = 1. 41 s v = u + at Practice 2. 3 (p. 83) 1 2 D D = 0 + 10(1. 41) = 14. 1 m s–1 It takes 1. 41 s for a diver to drop from a 10-m platform. His speed is 14. 1 m s–1 when he enters the water.  © 7 Take the upward direction as positive. By v = u + 2as, 4 = 0 + (2)(–10)s s = 0. 8 m 2 2 2 Besides, since Y spends a shorter time to reach its highest point, it should be fired after X. 10 (a) By s = ut + The highest position reached by the puppy is 0. m above the ground. 8 (a) Consider the boy’s downward journey. Take the downward direction as positive. 1 By s = ut + at2, 2 1 0. 5 = 0 + (10) t2 2 t = 0. 316 s 1 2 at , 2 1 120 = 8t + ? 10 ? t2 2 t = 4. 16 s or t = ? 5. 76 s (rejected) It takes 4. 16 s to reach the ground. (b) v = u + at = 8 + 10 ? 4. 16 = 49. 6 m s–1 Its speed on hitting the ground is 49. 6 m s–1. 11 (a) Distance between the ceiling and her hands = 6 – 2 – 1. 2 = 2. 8 m Hang-time of the boy = 0. 316 ? 2 = 0. 632 s (b) Let s be her vertical displacement when she jumps. As the maximum jumping speed is 8 m s–1, i. e . u = 8 m s–1. By v2 = u2 + 2as, v2 ? 2 s= 2a 2 0 ? 82 = (upwards is positive) 2 ? (? 10) s = 3. 2 m > 2. 8 m Therefore, the indoor playground is not safe for playing trampoline. 1 (a) By s = ut + at2, 2 1 132 = 0 ? t + ? 10 ? t2 2 t = 5. 14 s The vehicle can experience a free fall in the Zero-G facility for 5. 14 s. (b) Take the upward direction as positive. By v = u + 2as, 0 = u + 2 ? (–10) ? 0. 5 u = 3. 16 m s–1 2 2 2 The jumping speed of the boy is 3. 16 m s–1. 9 Take the upward direction as positive. (a) By v2 = u2 + 2as, 0 = u2 + 2(–10)(200) u = 63. 2 m s–1 The velocity of the firework X is 63. 2 m s–1 when it is fired. 12 (b) By v = u + at, = 63. 2 + (–10)t t = 6. 32 s It takes 6. 32 s for the firework X to reach that height. (c) From (a) and (b), for firework Y to explode at 130 m above the ground, the speed of Y should be smaller than that of X. Therefore, Y should be fired at a (b) By v2 = u2 + 2as, v2 = 02 + 2 ? 10 ? 132 v = 51. 4 m s? 1 The speed of the vehicle before it comes to a stop is 51. 4 m s? 1.  © lower speed. (c) Take the upward direction as positive. By v = u + at, –v = v – gt 2v = gt If the stone is projected with a speed of 2v, let the new time of travel be t?. (–2v) = (2v) – gt? v t? = 4 ( ) g = 2t Its new time of travel is 2t. 6 B Take the upward direction as positive. 1 s = ut + at2 2 1 = (10)(4) + (–10)(4)2 2 = –40 m The distance between the sandbag and the ground is 40 m when it leaves the balloon. Revision exercise 2 Multiple-choice (p. 87) 1 D By v2 = u2 + 2as, 0 = 102 + 2a(25 – 10 ? 0. 2) a = –2. 17 m s–2 His minimum deceleration is 2. 17 m s–2. 2 3 D B Consider the rock released from the 2nd floor. By v2 = u2 + 2as, v2 = 2as floor. Note that s2 = 3. 5s. (v2)2 = 2as2 = 3. 5(2as) = 3. 5v2 v2 = 1. 87v (as u = 0) Then consider the rock released from the 7th 7 8 D C Take the downward direction as positive. u = 200 m s–1, v = 5 m s–1, a = ? 0 m s–2 By v = u + at, 5 = 200 + (? 20)t t = 9. 75 s The rockets should be fired for at least 9. 75 s. Both C and D satisfy this requirement. But for D, after firing for 10. 2 s, v = u + at = 200 + (–20)(10. 2) = –4 m s–1 i. e. it flies away from the Moon with 4 m s–1 upwards. It c annot land on the Moon. Therefore, the correct answer is C. 4 5 A C The stone returns to the ground with the same speed (but in opposite direction). 9 10 D D  © 11 12 13 (HKCEE 2006 Paper II Q1) (HKCEE 2007 Paper II Q2) (HKCEE 2007 Paper II Q33) (b) (i) Conventional (p. 89) 1 (a) The reaction time of the driver is 0. 6 s. (b) v a= t = 0 ? 12 3. 6 ? . 6 (1A) (Correct axes with label) from t = 1. 20 s to 1. 25 s) from t = 1. 45 s to 1. 50 s) (1A) (1A) (1A) (A straight line with slope = 0. 35 m s–1 (A straight line with slope = –0. 35 m s–1 (1A) (1M) = –4 m s–2 The acceleration of the car is –4 m s–2. (c) The stopping distance of the car is the area under graph. Stopping distance 12 ? (3. 6 ? 0. 6) =12 ? 0. 6 + 2 = 25. 2 m The stopping distance of the car is shorter than 27 m. The driver will not be charged with driving past a red light. (1A) (1A) (1M) (ii) 2 (a) The object moves away from the motion sensor with uniform velocity at 0. 35 m s–1 from t = 1. 20 s to 1. 25 s. 1A) From t = 1. 25 s to 1. 45 s, the object moves with negative acceleration. (1A) Then, from t = 1. 45 s to 1. 50 s, the object changes its moving direction and moves towards the motion sensor again with a uniform velocity of –0. 35 m s–1. (1A) (Correct axes with labels) (1A) (Correct graph with the acceleration of ? 0. 35 ? 0. 35 about 1. 40 ? 1. 30 = –7 m s–2 at t = 1. 30 s to 1. 40 s) (1A) !  © 3 (a) (b) Total displacement of the car = area bound by the v? t graph and the time axis 1 1 = (5 ? 5) ? (20 ? 3) 2 2 = ? 17. 5 m (1M) (1A) (c) Yes, the car moves 12. 5 m forwards from t = 0 to t = 5 s. Therefore, it hits the roadblock. 1A) 5 Take the upward direction as positive. (a) From point A to the highest point: (Correct axes with labels) (Correct shape of minibus’ graph) (Correct shape of sports car’s graph) (Correct values) (1A) (1A) (1A) (1A) By v2 = u2 + 2as, 0 = 42 + 2 (–10) s s = 0 . 8 m By v = u + at, 0 = 4 + (–10)t t = 0. 4 s (1M) From the highest point to the trampoline: 1 s = ut + at2 (1M) 2 1 = 0 + (–10)(1. 2 – 0. 4)2 2 = –3. 2 m (1A) 3. 2 m above the trampoline. (1A) The maximum height reached by him is (1M) (b) From the graph in (a), the two vehicles have the same velocity at t ? 2. 3 s after passing the traffic light. (1A) (1M) (c) The area under graph is the displacement of the cars. Consider their displacements at t = 3 s, For the sports car: 1 s = ? 15 ? 3 = 22. 5 m 2 For the minibus: 1 s = ? (7 + 13) ? 3 = 30 m 2 The minibus will take the lead 3 s after passing the traffic light. (1A) (b) Height of point A above the trampoline (1A) = 3. 2 – 0. 8 = 2. 4 m (1M) (1A) 6 (a) Initial velocity v = 90 km h–1 90 = m s–1 3. 6 = 25 m s–1 Thinking distance =v? t = 25 ? 0. 2 =5m The thinking distance is 5 m. (1A) (1M) 4 (a) The car moves forward with uniform acceleration at ? 1 m s? 2 from t = 0 s to t = 5 s. (1A) (1A) Then the car changes its moving direction. From t = 5 s to t = 8 s, it moves backwards with a uniform acceleration of ? 6. 67 m s . ?2 Its instantaneous velocity is 0 at t = 5 s. (1A) †  © (b) By v2 = u2 + 2as, v2 ? u2 a= 2s 2 0 ? 25 2 = 2 ? (80 ? 5) = ? 4. 17 m s–2 4. 17 m s–2. (1M) (c) The slope of the graph is the magnitude of the acceleration of the apple. speed / m s? 1 7. 75 (1A) (1A) Hence, the deceleration of the car is (c) By v2 = u2 + 2as, s= v ? u 2a 0 2 ? 25 2 = 2 ? ( ? 4. 17 ? 2) 2 2 (1M) 0 0. 775 time / s (Correct labelled axes) (2A) (1A) (Straight line with a slope of 10 m s? 2) = 37. 5 m Braking distance = 37. 5 m Stopping distance = 37. 5 + 5 = 42. m (1M) (d) The two graphs have no difference. (1A) (1A) 8 (a) Take the downward direction as positive. By v2 = u2 + 2gs, v = u + 2 gs 2 The driver could not stop before the traffic light. Therefore, his claim is incorrect. (1A) (1M) 7 (a) Take the downward direction as positive. 1 By s = ut + gt2, 2 1 3 = 0 ? t + ? 10 ? t2 2 3? 2 t= = 0. 775 s 10 (1M) = 0 2 + 2 ? 10 ? (40 ? 3) = 27. 2 m s–1 cushion is 27. 2 m s? 1. 1 (b) (i) By s = ut + gt2, 2 1 40 – 3 = 0 + ? 10 ? t2 2 t = 2. 72 s (1A) The speed of the residents landing on the (1M) (1A) The apple travels in air for 0. 775 s. (1A) (b) By v2 = u2 + 2as, v = 2 ? 10 ? 3 (1M) 1A) –1 = 7. 75 m s? 1 The speed of the apple is 7. 75 m s when the apple just reaches the ground. The time of travel in air is 2. 72 s. u+v (ii) By s = t, (1M) 2 2s t= u+v 2? 3 = t 27. 2 + 0 = 0. 221 s (1A) The time of contact is 0. 221 s.  © (c) (b) Slope of the graph from t = 0 to t = 0. 28 s 2. 3 ? 0 = 0. 28 ? 0 = 8. 21 m s–2 The acceleration of the ball due to gravity is 8. 21 m s–2. (1M) (1A) (c) (Correct labeled axes) (Correct shape) (Correct values) (1A) (1A) (1A) (i) 9 (a) t = 2 s: Displacement of the trolley = 0. 7 ? 0. 15 = 0. 55 m t = 3. 4 s: (1A) Displacement of the trolley = 1. 175 ? 0. 15 = 1. 025 m t = 4. 9 s: 1A) Displacement of the trolley = 0. 6 ? 0 . 15 = 0. 45 m (1A) (b) It moves away from the motion sensor with a changing speed from t = 2 s to t = 3. 4 s. (Correct sign) (Correct shape) (1A) (1A) (1A) (1A) (1A) (ii) The method does not work Then it rests momentarily at t = 3. 4 s. After that, it moves towards the motion since ultrasound will be reflected by the transparent plastic plate. (1A) (c) sensor with a changing speed. 1 By s = ut + at2, 2 1 ? 0. 1 = 0. 7 ? 2. 9 + ? a ? (2. 9)2 2 a = ? 0. 507 m s? 2 (1A) (1M) 11 (a) (i) The ball is held 0. 15 m from sensor before being released. The ball hits the ground which is 1. m from the sensor. (1A) (1A) Therefore, the ball drops a height of 0. 95 m. which are 0. 45 m, 0. 65 m and 0. 775 m from the sensor in its first 3 rebounds. (1A) The acceleration of the trolley is ? 0. 507 m s? 2. (ii) The ball rebounds to the positions 10 (a) The motion sensor is protruded outside the table to avoid the reflection of ultrasonic signal from table. (1A)  © At the 1st rebound, the ball rises up (1. 1 ? 0. 45) = 0. 65 m. nd The average acceleration is 66. 6 m s–2. (1A) (1A) (1A) (c) v / m s? 1 6. 32 At the 2 rebound, the ball rises up (1. 1 ? 0. 65) = 0. 45 m. rd At the 3 rebound, the ball rises up (1. 1 ? 0. 75) = 0. 325 m. (b) (i) The ball hits the ground with velocities of 3. 9 m s , 3. 25 m s and 2. 75 m s–1 in its first 3 rebounds. (3A) 3. 9 (1M) 0. 95 ? 0. 55 (1A) –1 –1 t3 t1 t2 t4 t5 t/s (ii) Acceleration = slope of graph = = 9. 75 m s–2 ?6. 32 (3 straight lines) (Correct slopes) (1A) (1A) 12 Take the downward direction as positive. 1 (a) By s = ut + gt2, (1M) 2 1 2 = 0 ? t + ? 10 ? t2 2 2? 2 t= = 0. 632 s (1A) 10 It takes 0. 632 s from t1 to t2. (Correct labels of time and velocity)(1A) 13 (a) Speed v = 70 km h–1 70 = m s–1 3. 6 = 19. 4 m s–1 d Reaction time = v 6 = 19. 4 = 0. 309 s The reaction time of the man was 0. 09 s. (1M) (b) At t2, v = u + at (1A) = 0 + 10 ? 0. 632 = 6. 32 m s –1 –1 (1 M) Shirley’s speed is 6. 32 m s when she lands on the trampoline at t2. At t4, she leaves the trampoline at the same speed. Therefore, from t3 to t4, by v2 = u2 + 2as, a= v2 ? u2 2s (? 6. 32) 2 ? 0 2 = 2 ? 0. 3 (b) By v2 = u2 + 2as, v2 ? u2 a= 2s 2 0 ? 19. 4 2 = 2 ? 48 = –3. 92 m s–2 3. 92 m s–2. (1M) (1M) (1A) The average deceleration of the car was (c) (1A) Speed v = 80 km h–1 80 = m s–1 3. 6 = 22. 2 m s–1 = 66. 6 m s–2  © Thinking distance = vt = 22. 2 ? 0. 309 = 6. 86 m By v = u + 2as, braking distance s v2 ? u2 = 2a 2 0 ? 22. 2 2 = 2 ? ? 3. 92) 2 2 (1A) Take the upward direction as positive. 1 s = ut + at2 (1M) 2 1 = 7 ? 1. 75 + ? (–10) ? 1. 752 2 = –3. 06 m (negative means the water is below the spring board) The spring board is 3. 06 m above the water. Alternative method: (1A) = 62. 9 m Therefore, the stopping distance = 6. 86 + 62. 9 = 69. 8 m (1A) Consider the upward motion and downward motion separatel y. For the upward motion, she takes 0. 7 s to reach the highest point from the spring board. Take the upward direction as positive. 1 By s = ut + at2, (1M) 2 1 s1 = 7 ? 0. 7 + ? (–10) ? 0. 72 2 = 2. 45 m For the downward motion, she takes 1. 5 s from the highest point to enter water. Take the downward direction as positive. By s = ut + 1 2 gt , 2 1 s2 = 0 + ? 10 ? 1. 052 = 5. 51 m 2 (1A) This stopping distance is greater than the initial distance between the car and the boy. (1A) Therefore, the car would have knocked down the boy if the car had travelled at 80 km h? 1 or faster. (d) A drunk has a longer reaction time. (1A) This means that the thinking distance, and thus the stopping distance (sum of thinking distance and braking distance), increases. (1A) (1M) (1A) 14 (a) Take the upward direction as positive. By v = u + at, u = 0 ? (? 10) ? 0. 7 = 7 m s–1 board is 7 m s . 1 Therefore the height of the spring board above the water = s2 – s1 = 5. 51 – 2. 4 5 = 3. 06 m (1A) (1M) (1A) The speed of Belinda leaving the spring (b) Total time taken from the spring board to the water = 0. 7 + 1. 05 = 1. 75 s (c) v = u + at = 0 + (? 10) ? 1. 05 = ? 10. 5 m s–1 is 10. 5 m s–1.  © The speed of the diver entering the water (d) Deceleration of car Y = slope of the graph during 0. 5 s? 8. 5 s = 0 ? 19. 4 = –2. 43 m s–2 8. 5 ? 0. 5 (1A) The deceleration of car Y is 2. 43 m s–2. (c) Thinking distance = area under the graph during 0? 0. 5 s = 19. 4 ? 0. 5 = 9. 7 m (1A) (Correct shape) (Correct times) (Correct velocities) 1A) (1A) (1A) Braking distance = area under the graph during 0. 5 s? 8. 5 s 1 = ? 19. 4 ? (8. 5 – 0. 5) 2 = 77. 6 m distance are 9. 7 m and 77. 6 m respectively. (1A) The thinking distance and the braking (e) (See the figure in (d). ) (Correct slope – parallel to that in (d). ) (1A) (Correct position – above that in (d). ) (1A) 15 (a) Speed 70 km h–1 70 = m s–1 3 . 6 = 19. 4 m s –1 (d) The coloured area is equal to the difference in the stopping distances travelled by cars X and Y. (1A) (e) (1M) Stopping distance of car X = area under the graph during 0? 5 s 1 = ? 19. 4 ? 5 = 48. 5 m 2 Coloured area = 9. 7 + 77. 6 – 48. = 38. 8 m < 50 m Since the difference in stopping distances of the cars is smaller than the initial separation of the cars, the two cars do not collide with each other before they stop. (1A) (1M) (1M) Distance travelled by car Y in 2 s = vt = 19. 4 ? 2 = 38. 8 m < 50 m Since the distance between the cars is greater than the distance that car Y can travel in 2 s, the driver of car Y obeys the rule. corresponding v–t graph. Deceleration of car X = slope of the graph during 0? 5 s (1A) (1M) (b) Deceleration of a car is the slope of their 0 ? 19. 4 = 5? 0 = –3. 88 m s–2 The deceleration of car X is 3. 88 m s–2. (1A) 16 a) From t = 0 s to t = 5 s, the car moves with a uniform acceleration of 17 ? 0 = 3. 4 m s–2. 5 (1A)  © From t = 5 s to t = 20 s, the car moves with a constant velocity of 17 m s–1. (1A) From t = 20 s to t = 28 s, the car moves with a uniform acceleration of 0 ? 17 = ? 2. 125 m s–2. 28 ? 20 at rest. (1A) (b) s = ut + 1 2 at 2 1 = 0 + ? 17. 5 ? (8 ? 60)2 2 = 2 016 000 m (2016 km) (1M) (1A) The Shuttle travels 2 016 000 m (2016 km) in the first 8 minutes. From t = 28 s to t = 30 s, the car remains (1A) 19 (a) (i) The cyclist is using first gear when the acceleration is greatest before braking. shortest time. (1A) (1A) (1M) (1M) (1A) b) (ii) The cyclist uses second gear for the (b) Distance travelled = area under straight line PQ (8 + 6) ? 2 = 2 = 14 m The cyclist travels 14 m in second gear. (c) The acceleration during t = 18 s? 20 s 0? 9 = (1M) 20 ? 18 = ? 4. 5 m s–2 The deceleration is 4. 5 m s . –2 (1A) (Correct shape) (Correct time instants) (Correct accelerations) (1A) (1A) (1A) (1A) (1A) 20 21 (c) Yes. (HKCEE 2 005 Paper I Q1) 1 (a) s = ut + at2 2 1 = 0 + ? 10 ? (500 ? 10? 3)2 2 = 1. 25 m Therefore the minimum height the (1M) The car changes direction at t = 30 s. Its velocity changes from positive to negative, showing a change in its travelling direction. 1A) (1M) (1A) (1A) laptop must fall for it to be ‘saved’ is 1. 25 m. (b) v = u + at = 0 + 10 ? (500 ? 10 ) = 5 m s? 1 the ground is 5 m s–1. ?3 (1M) (1A) 17 18 (HKCEE 2002 Paper I Q8) (a) v = u + at = 0 + 17. 5 ? 8 ? 60 = 8400 m s–1 minutes is 8400 m s–1. The speed of the computer when it hits The speed of the Shuttle after the first 8  © (c) Most falls are likely to be from below this height, effect. (1A) (1A) (1A) so the protection will not have taken Physics in articles (p. 96) (a) 2. 45 m (b) (i) By v2 = u2 + 2as, u = v ? 2as u2 = 0 ? 2(? 10)(2. 45 + 0. 07 ? 1. 09) u = 5. 35 m s? 1 2 2 (1A) (1M) Take the upward direction as positive. 22 (a) Any one from: Rate of change of displacement Displacement per unit time (1A) (b) The velocity of a braking car is decreasing (with time) (1A) so the car has negative acceleration. (1A) Its displacement is (still) increasing with time, so its velocity is (still) positive In this case, the acceleration and velocity are in opposite directions. (1A) (1A) (1A) The vertical speed of Javier Sotomayor is 5. 35 m s? 1 when he leaves the ground. (ii) Take the upward direction as positive. Consider the upward journey. By v = u + at, v ? u 0 ? 5. 35 t= = = 0. 54 s a ? 10 (1M) (c) i) Consider the downward journey. 1 By s = ut + at2, (1M) 2 1 ? (2. 45 + 0. 07 ? 0. 71) = 0 + (? 10) t2 2 t = 0. 60 s The time that he stays in the air = (0. 54 + 0. 60) = 1. 14 s Alternative method: (1A) (Correct graph) (1A) Take the upward direction as positive. 1 By s = ut + at2, (1M) 2 (0. 71 ? 1. 09) = 5. 35t + 1 (? 10)t 2 (1M) 2 t = 1. 14 s or t = ? 0. 07 s (rejected) (ii) Vertical distance travelled = area under the graph from 4. 0 s to 10. 0 s (70 + 130)? 6 = 2 (1M) (1A) The time that he stays in the air is 1. 14 s. = 600 m (1A) The vertical distance travelled by the rocket between t = 4. 0 s and t = 10. s is 600 m.  © 3 1 2 3 4 C C Force and Motion 6 (a) The MTR train is accelerating in the forward direction. The man tends to move at his original speed (smaller speed), so he would move backwards relative to the MTR train. (b) The MTR train is slowing down. The man tends to move at his original speed (greater speed), so he would move forwards relative to the MTR train. (c) The MTR train is moving forwards at constant velocity. The man moves forwards with the same constant velocity, so he would remain at rest relative to the MTR train. (d) The MTR train is turning a corner. The Practice 3. 1 (p. 104) (b), (e), (f) 5 a) Stretching a rubber band (b) Standing on the floor (c) Walking time (e) (f) A compass A rubbed plastic ruler attracts small bi ts of paper (d) Exists in every object on the earth at any 7 man tends to move at his original direction, so he would move outwards relative to the MTR train. In space, the gravitational force acts on the spaceship is negligible. When the rockets are shut down, they do not exert a force on the spaceship. Therefore, no net force acts on the spaceship. By Newton’s first law, the spaceship is in uniform motion and can travel far out in space. 8 Joan moves on the ice surface with a constant velocity. Practice 3. 2 (p. 111) 1 2 3 4 5 C C D C (a) No. Athletes would hit the wall of the stadium if it is too close to the finishing line. (b) The mat is used to protect the athletes if they hit the wall after passing the finishing line. Practice 3. 3 (p. 122) 1 2 3 4 5 D A B A D  © 6 (a) 7 (a) Horizontal component = 40 + 30 cos 30 ° = 66. 0 N Vertical component = 30 sin 30 ° = 15 N Resultant = 66 2 + 15 2 = 67. 7 N Let ? be the angle between the resultant Resultant’s magnitude is 67 N and the angle between the resultant and the horizontal is 13 °. (b) and the horizontal. 15 tan = ? = 12. 8 ° 66 Resultant’s magnitude is 67. N and the angle between the resultant and the horizontal is 12. 8 °. (b) Horizontal component = 40 + 30 cos 45 ° = 61. 2 N Vertical component = 30 sin 45 ° = 21. 2 N Resultant’s magnitude is 65 N and the angle between the resultant and the horizontal is 19 °. (c) Resultant = 61. 2 2 + 21. 2 2 = 64. 8 N Let ? be the angle between t he resultant and the horizontal. 21. 2 tan = ? = 19. 1 ° 61. 2 Resultant’s magnitude is 64. 8 N and the angle between the resultant and the horizontal is 19. 1 °. (c) Resultant’s magnitude is 60 N and the angle between the resultant and the horizontal is 25 °. (d) Horizontal component = 40 + 30 cos 60 ° = 55 N Vertical component = 30 sin 60 ° = 26. 0 N Resultant = 55 2 + 26. 0 2 = 60. 8 N Let ? be the angle between the resultant and the horizontal. 26. 0 ? = 25. 3 ° tan = 55 Resultant’s magnitude is 60. 8 N and the angle between the resultant and the Resultant’s magnitude is 50 N and the angle between the resultant and the horizontal is 37 °. horizontal is 25. 3 °.  © (d) Resultant = 40 2 + 30 2 = 50 N Let ? be the angle between the resultant and the horizontal. 30 tan = ? = 36. 9 ° 40 Resultant’s magnitude is 50 N and the angle between the resultant and the horizontal is 36. 9 °. Hence, the angle between the two 5-N forces is 120 °. Alternative method: By tip-to-tail method, the two 5-N forces and the resultant 5-N force form an equilateral triangle. It is known that each angle of an equilateral triangle is 60 °. Therefore, the angle between the two 5-N forces is 120 °. 8 (a) 10 (b) Resultant force = 2 ? 400 = 800 N The resultant force provided by the cable is 800 N. 11 For the 2-kg mass: (c) 9 R = weight ? cos ? = 20 cos 30 ° = 17. 3 N Suppose the two forces act in the direction as shown. T = 20 N Therefore we have: Vertical component Fx = 5 sin ? Horizontal component Fy = 5 ? 5 cos ? = 5 ? 1 ? cos ? ) (magnitude of the resultant)2 = Fx2 + Fy 2 52 = (5 sin ? )2 + [5 ? (1 ? cos ? )]2 1 = sin ? + 1 ? 2 cos ? + cos ? 2 2 2T cos 45 ° = W 2 ? 20 ? cos 45 ° = W cos ? = 0. 5 W = 28. 3 N ? = 60 °  © 12 (a) 2T sin 10 ° = 500 T = 1440 N The tension of the string is 1440 N. 3 4 5 6 B C A Net force = ma = 40 ? 0. 5 = 20 N C By v2 – u2 = 2as, 0 à ¢â‚¬â€œ u2 = 2a(20) ? u2 = 40a u2 a=? 40 Resistance = ma = 12 ? ? u2 = –0. 03u2 40 (b) Component of force = T cos 10 ° = 1440 ? cos 10 ° = 1420 N The component of the force that pulls the car is 1420 N. 13 (a) 7 8 ‘A bag of sugar weighs 10 N. ’ or ‘A bag of sugar has a mass of 1 kg. By F = ma, F 800 000 a= = = 2 m s–2 m 4 ? 10 5 (b) As the mass is stationary, the net force acting on it is zero. When it flies horizontally, its acceleration is 2 m s–2. 100 ( )? 0 v? u (a) a = = 3. 6 = 4. 63 m s–2 t 6 The acceleration of the car is 4. 63 m s–2. (c) (i) y-component of F1 = weight of mass = 10 N 9 y-component of F1 = F1 sin 30 ° F1 sin 30 ° = 10 N F1 = 20 N x-component of F1 = F1 cos 30 ° = 20 cos 30 ° = 17. 3 N (b) F = ma = 1500 ? 4. 63 = 6945 N The force provided by the car engine is 6945 N. 10 (a) (ii) y-component of F2 = 0 x-component of F2 = x-component of F1 = 17. 3 N

It Should Be Mandatory for Everyone to Donate One of Their Organs When They Die

There is a technology such as organ transplant which replaces patient’s organs to save life. Nowadays the heart, liver, lungs, kidneys, intestines and pancreas can be transplanted. Therefore the demand for organs is very high. This essay will discuss as to whether or not people should be forced to donate one of their organs when they die. Firstly, the demand for organs is higher than supply. In the United States, more than 80,000 people are in the waiting list for organ transplant. Almost 28,000 people’s organs were transplanted in 2005. So, many people think government needs to make it compulsory for people to donate their organs when they die. Patients will still have chance to live. Secondly, people should have a meaningful way to die, by donating their organs, so people who are needing organ transplant will have the chance to live. When people die, heart can be preserved for 4 hours, pancreas and liver can be preserved 12 hours. In China, executed prisoners are allowed to donate their organs to have a chance to do good things for the society. In many religions, people are not allowed to donate their organs. In Japan, many people believe Shinto. The rule of Shinto is the wholeness of body. According to Shinto tradition, if people died, their bodies will be impure. If some people have organ transplant which use dead persons’ organs, they will have bad luck. So organ transplant is not favorable. Doctors can use high technology product to replace patients’ organs rather than using organs from death. For example, the use of a Jarvik 2000, a machine that assists to get the heart works again. Another technology is Colon, it can use organ’s cells to make a new same organ. So, people don’t have a need to wait for suitable organs from the hospital. In summary, organ demands are increasing than supply. However, many religions do not allow organ donation. In China, although many organs are donated by executed prisoners, still cannot accommodate for patients waiting for organ transplant. The government should make it mandatory for everyone to donate their organs when they die.

Language A Very Complicated System Education Essay

Language, a really complicated system, is really polar to human existences ( Saffran & A ; Thiessen, 2007 ) . It allows people to show their ideas, communicate with each other, and transmit cognition ( Scanlon, 1977 ) . Its importance stimulates a batch of research workers to research the development of linguistic communication in kids ( Shatz, 2007 ) . There are several sensible theories explicating how kids learn a linguistic communication ( Evans, 2007 ) . Some suggests that societal environment as an of import component in determining kids ‘s lingual development ; while Chomsky, a nativist theoretician, argues that there is a Language Acquisition Device inherently born with us, and human existences can get linguistic communication of course ( Meisel, 1995 ) . Harmonizing to Chomsky ( 1959 ) , there is a poorness of stimulation that the lingual input available in the societal environment is so limited for kids to develop a linguistic communication system, and therefore there must be some biological predisposed mechanism accounting for human lingual development. The undermentioned essay is non trying to reason against Chomsky ‘s thought, but to exemplify how the societal environment interacts with the innate lingual ability and determine the development of linguistic communication in kids. It has long been suggested that societal environment plays a important function in kids ‘s lingual development. Behaviorists, one of the earliest histories of linguistic communication development, see linguistic communication acquisition as a merchandise of operant conditioning ( Evans, 2007 ) . Skinner, the suggester of behaviourist theory, stresses that the acquisition of linguistic communication is besides contingent upon the effects of larning it ( Shatz, 2007 ) . For case, when a kid additions favourable attending from its parents ( a sort of intangible support ) after bring forthing a peculiar sound, it is really likely that the kid will reproduce that sound. The behaviourists have shortly been to a great extent criticized for their oversimplified theoretical account of human linguistic communication acquisition. There so comes the rise of empiricist and socio-pragmatic theoreticians which emphasize the importance of societal and cognitive elements of linguistic communica tion ( Tomasello, 1998 ) . Tomasello ( 2003 ) proposed the usage-based theory and explained linguistic communication acquisition utilizing a functional attack ( Tomasello, 2003 ) . Language develops when kids have the desire to pass on purposes with the others and when they realize the matter-of-fact maps of linguistic communication in the society ( ( Inhelder & A ; Piaget, 1980 ; Mueller Gathercole & A ; Hoff, 2007 ) . They learn the constructions of linguistic communication through observation ( Tomasello, 2003 ) and accrued linguistic communication experiences ( Lieven & A ; Tomasello, 2008 ) . Baldwin and Meyer ( 2007 ) argued that linguistic communication is inherently a societal behaviour. A word itself does non incorporate any significance, it is the members of societal community who use it and give it a significance ( Tomasello, 1999 ) . Therefore, to larn what a word is refer to, societal interaction is indispensable.Language and society is closely linked, and social factors to a great extent influence the linguistic communication to be used ( Evans, 2007 ) . Clearly, the societal environment plays a cardinal portion in determining the development of linguistic communication in kids. We shall concentrate on the societal environment in its broadest sense, non curtailing to peculiar scenes like place and school. The undermentioned essay chiefly explores how the measure and quality of societal interaction and stimulation, cultural norms and outlooks shapes kids ‘s lingual development.Social interaction and stimulationThe functional attack suggests that linguistic communication develops through kids ‘s battle in a societal context ( Robinson & A ; Ellis, 2008 ) and through their active interaction with others ( Inhelder & A ; Piaget, 1980 ) . The deficiency of societal interaction or an appropriate societal environment hinders normal development of linguistic communication in kids ( Rice, 2007 ) . For illustration, Genie, the miss who was kept entirely and locked in a room for 12 old ages, failed to utilize linguistic communication usually ( Pines, 1981 ) . Linguistic environment The most important component of linguistic communication development is the lingual input. Both the measure and quality of lingual input are of import. Measure can be expressed as the frequence of exposure to linguistic communication ; while quality is expressed as the assortment of input ( Hoff, 2006 ) . Surveies show that the more frequent the kids are exposed to peculiar words or sentence constructions, the earlier they can get and reproduce them. And the wider the scope of vocabularies the kids are exposed to, the more picks of word they have when building sentences ( Naigles and Hoff-Ginsberg, 1998 ) . However, lingual input is besides a sort of disciplinary feedback ( Mueller Gathercole & A ; Hoff, 2007 ) , so that kids who engage in more societal interaction have higher opportunities to be corrected when they make errors. Exposing to different types of input can heighten the profusion of the lingual environmen. For illustration, if one wants to larn Cantonese, s/he can actively seek for a Cantonese environment like watching Cantonese films, sing China Town, run intoing Cantonese friends, etc. different types of lingual input may assist linguistic communication development in different facets. The consequence of frequence of exposure in linguistic communication acquisition can besides be shown in survey that involves bilingual linguistic communication scholars. Bilingual linguistic communication scholars, holding to larn two linguistic communications at the same time, have less exposure to both the linguistic communications, comparing to monolingual kids ( Genesee & A ; Nicoladis, 2007 ) . It is found that bilingual kids have a smaller vocabulary size in each linguistic communication, and the sort of words they learn are rather different, as bilingual kids receive different lingual inputs from different communicative spouses. Bruner ( 1981 ) believed that linguistic communication development is a consequence of the interaction between nature and raising. As suggested, societal activities like ‘play ‘ are valuable beginnings of lingual input. During the drama clip, kids can actively prosecute in lingual exchange and interactions with the grownups ( Shatz, 2007 ) . It was found that kids who possessed playthings and engaged in originative drama were more sophisticated in showing themselves verbally and showed promotion in linguistic communication acquisition ( Scanlon, 1977 ) . Other linguistics stimulations and activities like playing with image cards and role-playing a narrative are besides good to the kids ‘s linguistic communication development ( Hoff & A ; Tian, 2005 ) . Research surveies showed that there is a birth-order difference in the development of linguistic communication in kids. First-born kids are relatively more advanced in sentence structure and vocabulary ; while later-born kids have better conversational accomplishment ( Hoff, 1998 ; 1999 ) . The ground history for such difference is closely linked with the differences in the type and measure of lingual input. First-born kids have been the lone kids before the reaching of younger siblings. Fakouri ( 1974 ) suggested that the parents ‘ love, attention, and attending to the individual kid are indivisible by, and they perchance prosecute the kid into a higher- quality interaction, and therefore the exposure of lingual input is greater. Upon the birth of a sibling, the opportunity of acquiring one-to-one communicative interaction with the parents is lessened for both kids ( Hoff, 2006 ) . Yet, the later-born kids have another beginning of lingual input, which is from their senior sib lings. However, the quality of the lingual inputs provided by elder siblings is dissimilar to that by the parents, as they normally are less complex and dwell more grammatical mistake. A antiphonal spouse The functionalists believe that a antiphonal spouse for communicative exchange is needed for linguistic communication acquisition. Just like the other types of development, linguistic communication acquisition besides needs the staging of grownups. A antiphonal spouse should be cognizant of what the kid is go toing to in the here-and-now context and follow into that peculiar object or event ( Karrass et al. , 2002 ) , so that the kid can do usage of this societal cue to larn the linguistic communication associated with that focused topographic point ( Diesendruck, Gelman, & A ; Lebowitz, 1998 ) . The particular type of societal interaction is called joint attending, and it strongly correlates with word acquisition ( Bruner, 1983 ) . Children can larn new words expeditiously when they are socially engaged or pass oning with a antiphonal spouse, and larn best if they jointly attend to execute some day-to-day modus operandis like bathing and dining ( Tomasello, 1999 ) . Research done by Tomasello and Todd ( 1983 ) showed that the continuance of battle in joint attending was positively correlated with vocabulary size. Questioning and giving immediate responses to kids can keep their involvement as good ( Tomasello, 1999 ) . Studies found that kids who have grownups prosecuting them in conversation and utilizing more wh-questions during communicating have relatively better development in aides and verb usage ( Hoff, 1999 ) . Social-interactionist theoreticians believed that a good communicative spouse of a kid should do good usage of kid directed address or motherese ( Snow, 1979 ) . Child-direct address is a particular signifier of talk that normally is rather simple, with the talkers expressing meaning-rich words like the names of aims and verbs one-by-one clearly. Furthermore, the talker normally negotiations with higher pitch to capture the attending of the kid ( Mueller Gathercole & A ; Hoff, 2007 ) . Research surveies on the use of child-direct address show that it is associated with enhanced phonological consciousness and word acknowledgment. However, it should be noted that although child-direct address is correlated with a broad scope of positive results, it is non indispensable for normal development of linguistic communication in kids. This alone type of address is non cosmopolitan, as in some states, speaking to babes with such a high-pitch and simple construction is considered as discourtesy to them ( Hoff, 2006 ) . There is grounds demoing that kids, whose communicative spouses have higher educational degree, possess wider scope of vocabularies and are able to organize comparatively long and complicated sentences. They are besides better in depicting objects or evens that are non instantly present ( Umek, Fekonja, Kranjc & A ; Bajc, 2008 ) . The difference in the caretakers ‘ educational degree may connote the difference in the profusion of kids ‘s lingual environment and rational stimulation. Higher educated health professionals perchance can supply more acquisition chances to their kids than caretakers who are less educated. This shows how of import lingual input is for the favourable development of linguistic communication in kids. Cultural norms and outlooks are another country that can do a immense consequence of kids ‘s linguistic communication acquisition.Cultural norms and outlooksThere are a batch of cultural norms and outlooks invisibly hidden in a kid ‘s socie tal environment ( Inhelder & A ; Piaget, 1980 ; Ochs & A ; Schieffelin, 1995 ) . The impact of cultural norms and outlooks on linguistic communication development are more hard to mensurate ( Herschensohn, 2007 ) , as kids internalize these norms and bit by bit absorb them as 1 ‘s ain values ( Inhelder & A ; Piaget, 1980 ) . The undermentioned portion illustrates how societal category, ethnicity, gender and equals shape the development of linguistic communication in kids. Social category Many research surveies found differences in the ways and forms of linguistic communication development among kids of different societal categories. Health professionals in the upper category speak more to their kids ; and in bend greatly expand the vocabulary size of these kids ( Hoff, 2006 ) . To be more precise, the kids ‘s vocabulary size is found to be positively correlated with the health professionals ‘ or parents ‘ figure of words spoken to them. Besides a quantitative difference, there are besides qualitative differences between the two societal categories. The unwritten linguistic communication of kids from lower socio-economic standing was worse than those from higher socio-economic position ( Hoff, 2006 ) . Upper category parents talk to their kids normally because they want and plan to prosecute in a conversation with them ; while lower category parents normally talk to their kids for some practical grounds like giving them instructions to work [ ( Hoff, 2006 ) . Children of from the upper category are exposed to a wider scope of vocabularies, particularly the productive vocabularies ( Hoff, 2003 ) . Children normally spend most of the clip with the people from the same societal category ; the common influence reinforces the kids to move and speak in the same manner as the other members of the societal category do. And because of the self-fulfilling prognostication, kids might hold acted harmonizing to what the others expect ( Edwards, 1979 ) . Therefore, even the kids of different societal categories go to the same school, their li nguistic communication development might yet be really different. Ethnicity Peoples from different states experience different advancement in linguistic communication development. People ‘s pick of vocabularies can extremely reflect their cultural outlooks and norms. Peoples from an individualist civilization have a different linguistic communication attitudes and vocabulary pick as people from a collectivist-oriented state ( Gudykunst & A ; Schmidt, 1987 ) . As stated by Ayyash-Abdo ( 2001 ) , people believing in individuality concern more about their ain beliefs, demands and rights ; while people with a leftist mentality consider themselves as a portion of the whole community, and topographic point the group ‘s demands on a higher precedence than their ain demands. Collectivist seeks harmoniousness and emphasizes cooperation. Wu and Rubin ( 2000 ) found that, in footings of linguistic communication usage, individualists ‘ manner of showing their thoughts is more direct and self-asserting, and they use â€Å" I † more frequently to give voice their sentences. Conversely, leftists like to utilize â€Å" we † , and there are much more relational nouns in the Chinese linguistic communication that helps to do all right differentiations between different relations. For illustration, in English, â€Å" uncles † can intend one ‘s female parents ‘ senior or younger brothers, and besides one ‘s m ale parent senior or younger brothers. But in Chinese, there are four different nouns for those four different types of â€Å" uncles † . Several surveies attempted to compare the linguistic communication development in American yearlings with Nipponese yearlings. The former, in general, represents individuality ; while the latter represents Bolshevism. it was discovered that the American babes knew a broad scope of productive and receptive vocabularies ; while Nipponese babes were good at symbolic drama ( Tamis-LeMonda, Bornstein, Cyphers, Toda & A ; Ogino, 1992 ) . To account for the difference, Tamis-LeMonda, et Al. ( 1992 ) found that American female parents tend to label objects and events more on a regular basis, stress the demand of independency ; arouse the kids ‘s involvement in the external word ; and are more information-oriented when they talk to their kids. On the other manus, Nipponese female parents ever engage their kids in group drama and dyadic activities ; advance a sense of dependance ; and are more affect-oriented. Ethnicity does non merely act upon the kids ‘s size of vocabularies, but besides in a batch of ways such as the linguistic communication attitude, pick of words and ways to sentiments. The geographical features of a state besides have an impact on kids ‘s exposure to different types of words. For illustration, in Hong Kong and other metropoliss which are closer to the equator, snowing is non possible. In Cantonese, we merely have one noun to depict â€Å" snow † , without any other vocabularies that could depict the different types and strength of â€Å" snow † . In contrast, there are many words created to separate the assorted sorts of â€Å" snow † , e.g. snowstorms, snow squalls, bustles, graupel, sleet, dendrites, acerate leafs, snow pellets, etc. Gender Quite a batch of research surveies on the gender difference in linguistic communication development of kids show that misss, between one to three old ages old, could treat linguistic communication and reading at a faster rate and bring forth syntactically more complicated sentences than male childs of the same age ( Umek et al. , 2008 ) . Boys, instead, could understand the significance of words better ( Wolf & A ; Gow, 1986 ) . It appears that male childs are less well-developed in linguistic communication acquisition in the early old ages. Karrass et Al. ( 2002 ) suggested that this might good be the influence of gender stereotypes. It is normally taught and believed that male childs are more active and misss are more soft and elegant. It is found that parents of male childs are less sensitive to their linguistic communication accomplishments, but shows greater concern to the boy ‘s motor development ( Eaton & A ; Enns, 1986 ) . For misss, the parents tend to speak to their g irls more frequently, and prosecute them in communicative activities like story-telling. Peers Peers become increasingly of import as the kids grow up ( Fortman, 2003 ) . Childs further develop their linguistic communication and societal accomplishments through interacting with their equals. By that clip, in order to seek group designation and keep association with the group, different group norms and group ‘language ‘ like hip-hop may emerge to stand for group rank ( Giles, 1979 ) . The specific sort of linguistic communication is created for the group to admit each other and except the out-group members. Children at this age may change their linguistic communication attitude and ways of showing thoughts to make a positive self-image obtain a desirable group individuality ( Ryan, 1979 ) .DecisionA batch of facets within the societal environment drama of import functions in determining the development of linguistic communication in kids. Yet, as stated in the debut, Chomsky ‘s nativist theory is besides really sensible and influential. A well-developed lingui stic communication system is in fact a merchandise of rich societal environment and the kid ‘s willingness and accomplishments to react to the societal input.