The bounce of a Squash Ball Essay Example for Free

The bounce of a Squash Ball Essay However, some energy is lost as due to friction between the molecules in the air, and the surface of the ball. 3 This is during the time where the ball is in contact with the floor. There are really three stages here, I will show them below: i) ii) iii) In i, the ball has hit the ground, and because of inertia, the ball tries to keep moving and cant because the ground beneath it is solid. This causes the ball to change to a sort of oval shape, this change of shape causes some energy to be lost as heat and the kinetic energy to become Elastic Energy. Also, the ball hitting the ground will cause some energy to go on as sound and some will be sent through the surface as a wave. In ii, the ball is still, and has no energy other than Elastic Energy; it is exactly between i and iii. In iii, The Elastic Energy is being converted to Kinetic Energy, and causes the ball to go from the oval shape, back to its original shape, and bounces off of the ground. The Elastic Energy in the ball is now becoming Kinetic Energy again and the reshaping of the ball causes some more energy to be lost as heat. 4 Here the ball is going back up after bouncing off of the ground. The ball has Kinetic Energy, and again some energy is lost as heat due to friction between the air and the ball. 5 At this stage, the ball is stationary in the air because gravity has prevented it from rising any further. However, the ball is not as high as it was when it was dropped; this is because some energy was lost as heat. This stage links back to stage two repeatedly, until all of the energy from the ball has been lost, at which point it will become stationary on the ground. Prediction With this in mind, I am predicting that the higher the ball is dropped from, the higher it will bounce (due to increased energy). However, I predict that the ball will never reach the height it fell from because of energy which is lost as heat from friction and sound when it hits the ground. Calculating Epg The formula mgh (or Mass   Gravity   Height) will show the amount of Gravitational Potential Energy (Epg) the ball has at this stage. The mass of our ball was 0. 024 kg, which is constant (it doesnt change). The gravity here on Earth is 10N per kg of mass, for our ball this would mean 0. 24N, another constant. The height from which we drop the ball is a variable. Therefore to work out the Epg of the ball at any given height we would use the formula Height. We can shorten this to 0. 006 because mass and gravity are constant. For example, if we wanted to know how much Epg the ball had when held at 1. 00 m, we would do 0. 006 1. 00, which is 0. 006. The reason for calculating Epg is so that later on the kinetic energy (Ek) of the ball can be calculating, in turn allowing the velocity of the ball upon impact to be calculated. Method First of all, two metre sticks were placed vertically against a wall, one above the other, creating a makeshift double-metre stick, this was held against the wall. Next, the ball was held so that the bottom of it was aligned with the height (e. g. 1. 00 m). Meanwhile, another member of the team laid on the floor, facing the metre stick. The ball was then released when the member on the floor was ready. When the ball bounced up the member on the floor noted it down. This was repeated five times for each drop height (0. 8m, 1. 0m, 1. 2m, etc up to 2. 0m). After each drop height was done five times, the ball was heated to 40 degrees Celsius in a water bath. Our variable was the drop height of the ball. We chose the range 0. 6m 2. 0m because it achieves a good set of results, while not taking too much time after dropping from each height five times. We dropped the ball five times from each height and then obtained an average to try and get a good range of results, and also to eliminate anomalous results from our graphs. Results Table Drop Height (m) Gravitational Potential Energy (J) Bounce Height (m) Speed on Impact (m/sec) ms Analysis. The results in this table show that the Epg increases when the ball is held higher up. It also shows that the ball bounces higher when the drop height is higher, and that the ball will never bounce to the same height it was dropped from. One other thing my table shows is that the higher the drop height, the higher the speed of the ball on impact with the ground. This proves everything I predicted to be correct, and also correlates with my energy transfer diagram, which is what I based my prediction on. Ball Speed Epg = Ek on impact. To work out the velocity (speed) of the ball on impact we would use the formula v=VEk. First we need to know the value of Ek which is dependant on Evaluation There are just two anomalies, they are at 1. 4m and 1. 6m, they is quite far from the line of best fit. I believe the cause was human error perhaps in the inaccuracy of trying to see how high the ball was in a fraction of a second. If I had the chance to repeat this investigation, I would improve the procedure by improving the measuring system, perhaps by using a digital video camera to record how high the ball bounced and then playing it back frame by frame on a computer because it is very hard to see where the ball is in a fraction of a second with human eyesight. I would increase the range of results to be from 0. 2m maybe 5. 0m, because it would give a much larger range, in which perhaps the rule of the ball bouncing higher when dropped from higher would be incorrect.

Asian American Stereotypes Essay -- essays research papers

Pertaining to Tracy Lai’s article titled, â€Å"Asian American Women†, Lai discusses how stereotypes dehumanize people while turning them into objects to be manipulated. Lai touches on the topic of how Asian people and cultures are stereotyped as being inferior and exotic. The problem that Lai brings to our attention is that it is a struggle to be an Asian in America due to the fact that Asians have been denied political, economic and social equality in America. Lai also brings to our attention the die hard myth that Asians have made it in America, which is far from the truth. I sense that Lai’s argument is extremely effective due to the fact that stereotypes are not only seen among Asians, they are also seen in many other cultures and genders. For instance, women for years were battling for woman’s equality to be able to vote, and today women are still battling for equality in political and economic areas. In addition, African American’s are still trying to be accepted into certain political roles throughout our society. Since Tracy Lai is a Asian in America I feel that her argument holds great validity due to the fact that Lai shared her own personal experiences. By reading Lai’s personal feelings, it allowed me to understand her beliefs to a greater extent because I was able to see where she was coming from. Certainly I agree with Lai’s views because I have noticed that Asians are depicted as being inferior. For example, if you have ever seen a movie or a television show that...

Educational Failure Essay

â€Å"Every year, over 1. 2 million students drop out of high school in the United States alone. That’s a student every 26 seconds – or 7,000 a day† (Thornbergh). Why this happening and more importantly, what is being done to solve this problem? Because of boring classes, too much freedom, and just a lack of motivation, students nationwide are dropping out of school, and are starting on the path of minimum wage and regret. Schools are trying to resolve this issue by giving the support students the help they need, and giving them alternatives to traditional schooling. †¦nearly 1 out of 3 public high school students won’t graduate†(Thornbergh). That’s one third of today’s youths. That’s one out of three people that won’t go to college. That’s one of three people that won’t know the rewarding feeling of getting a diploma. But what’s wrong with this one third that isn’t wrong with the other two thirds? Some say it’s because if society, others say it’s because of schools. Really only half of the problem lies with schools. There are only a small percentage of dropouts that feel that they could never meet the criteria that the school demanded. Unfortunately, many students are not given the extra support they need to make a successful transition to high school and are lost in ninth grade†(Galesic 317). Most others aren’t engaged in school. â€Å"Boredom and disengagement are two key reasons students stop attending class and wind up dropping out of school†(Furger). â€Å"Fully 88% said they had passing grades in high school. When asked to name the reasons they had left school, more respondents named boredom than struggles with course work†(Thornbergh). With this combination, schools become what many students feel to be a waste of time. When schools get this reputation, they become what is known as dropout factories. â€Å"Approximately two thousand high schools (about 12 percent), known as the nation’ lowest performing high schools, produce nearly half of the nation‘s dropouts. In these schools, the number of seniors enrolled is routinely 60 percent or less than the number of freshmen three years earlier† (Galesic 314). Although schools have some blame for the problem at hand, the other half of the problem has origins that the schools can’t control, and that is society and family. Students don’t only have to deal with their school work, but also their peers and life at home. This can be stressful time for students, and, because of this stress, students’ grades may suffer. Even though a student’s grades are low, their parents might not know, or even care. Many parents just don’t pay any attention to their child’s grades. The shocking thing is that only fifty-one percent of parents somewhat knew that their child had low grades; the other percentages range anywhere from kind of knowing to almost not knowing at all. Even though dropping out doesn’t sound too bad, a person is branding themselves a quitter. Once a person drops out, there’s no going back. Sure, a person could get a GED, but, that still doesn’t hold the same weight as a diploma. Dropping out of schools will affect a person their entire life. â€Å"Even a GED is not sufficient for a job here anymore (Thornbergh). † There is no replacement for a diploma. The path of minimum wage and unemployment starts with dropping out. Only forty five percent of High school dropouts are able to find employment. Compared to the sixty eight percent that graduated, that’s a very low number in today’s economic state. Even if a drop out can be that forty five present that is employed, their annual earnings ($8,358) are only little more than half the earning of a High school Graduate ($14,601)(Sum, Ishwar, McLaughlin). Dropping out does not only affect the person who dropped out but also everyone around them. In today’s world, the efforts one person really affects everything around them. People often say, do as your told ;not as they do. That seems easy right? Well, when it comes to drop out, that’s not the case. Students are more likely to drop out if their parents did. When they drop out, their children are also more likely to drop out; leading through a vicious cycle of drop outs. Family isn’t the only thing affected by drop outs (Bridgeland, DiIulio, Morison). Over their working lives, the average high school dropout will have a negative net fiscal contribution to society of nearly -$5,200 while the average high school graduate generates a positive lifetime net fiscal contribution of $287,000. The average high school dropout will cost taxpayers over $292,000 in lower tax revenues, higher cash and in-kind transfer costs, and imposed incarceration costs relative to an average high school graduate. Adult dropouts in the U. S. in recent years have been a major fiscal burden to the rest of society. Given the current and projected deficits of the federal government, the fiscal burden of supporting dropouts and their families is no longer sustainable. ;(Sum, Ishwar, McLaughlin) Supporting dropouts and their families in no longer doable. So, what is actually being done to help students succeed in school and ultimately success in life? One solution that can has come into play in resent years in is alternative to traditional education such as viral schools and credits labs. They consist of virtual schools and programs that help students get back on track to graduating. With these They offer the help and support students need with out the social problems that traditional classes have such as labels, race, and learning disabilities. In doing so, theses alternatives are also adjusting learning to a more personal level. Education no longer has to be for the whole, but only for the small part that is the individual student. â€Å"Districts throughout the country are working to personalize learning by creating small schools or reorganizing large schools into small learning communities, as part of their strategy for reducing the dropout rate†(Furger). These individual students can now get more help and understanding then they would ever get in a traditional class room. Another Solution to this epidemic is stricter rules for schooling. Schools are not only making it harder to drop out, but also, raising the academic bar for students. Some students just quit because its acceptable , while others quit just because they’re board in schools. It would be no long acceptable to just quit if there are stricter penalties, right? Some states are making it so students can’t quit at an easily age. â€Å"Students who drop out before age 18 could have their driver’s license suspended or their work permit revoked unless their decision was first approved by a school or judge†(Thornbergh). But the problem doesn’t only lie with it just being acceptable, but also boredom. â€Å"Higher expectations and more challenging curriculum, coupled with the support students need to be successful, have proven to be an effective strategy not only for increasing graduation rates, but also for preparing students to graduate from high school with options†(Furger). The last and most research backed cure for this epidemic is early education. â€Å"Every month, new studies in neuroscience and psychology provide insights and warnings about how much of a person’s capacity for learning is shaped from birth to age 8. Young children need to experience rich language interactions with teachers, parents, and other adults who read to them, ask questions of them, and encourage their exploration of myriad subjects†(Guernsey Mead). Many students quit school because they are failing. â€Å"Preschool, they argue, is an early investment in youth that yields significant economic results later on. In their review of the research on preschool models in California and elsewhere, the authors found that one preschool program increased high school graduation rates by 11 percent, and another by 19 percent. Furger) â€Å"We need a much broader and deeper transformation of the educational system that starts, if parents choose, when children are as young as three years old and continues through the first few grades of elementary school. Early childhood does not stop at kindergarten; it extends through age eight, because children are still learning foundational skills in literacy, numeracy, social competence, and problem solving, they are more likely to retain them. (Guernsey, Mead) Because of boring classes, too much freedom, and just a lack of motivation, students nationwide are dropping out of school, and staring on the path of minimum wage and regret. Schools are trying to resolve this by giving the support students need and giving them alternatives to traditional schooling. In the time it took to read this, at least one student has dropped out. This needs to stop. Make a difference in one student’s life by helping the cause of helping students stay in school.

Ethics And Privacy Across International Borders - 2834 Words

Navi Walia Assignment 5 Ethics and Privacy Across International Borders MCL 510 11/26/14 Part 1: K: When developing Acme Data Analytics Inc. to take into the U.K. market, we need to determine the shopping behaviors of our clients. The raw data of the amount of times our clients search for â€Å"Christmas Deals† on Google, will determine how we should target our content to their browsers. M: But how will this provide quality search results that will ultimately produce our UK clients with the products they are searching for? Will these results be the right ones, thus satisfying the needs of the customer’s goals? To get gifts that will make their children happy? K: I am not concerned with the happiness of the children, rather that we are collecting the raw data and performing the duties to get maximum exposure to as many clients as possible. Based on this data, how do we replicate the results the following years? Does this lend to continued growth from the analysis of data to tangible profits in the coming years? A: Christmas time is a time for the children, and we need to take that into consideration when the searches are being performed, there are foreseeable consequences if we don’t. I feel that by collecting data based on just â€Å"Christmas Deals† is not enough. We should incorporate more measures such as last year’s U.K. Christmas online shopping trends, products that are hot this year, and what the children are asking for most this holiday season. M: I couldShow MoreRelatedPrivacy Policy Essay example1343 Words   |  6 PagesIt has become a sad fact that in today’s society the truth is that the right to one’s privacy in the information technological world has simply become a joke. The growth of computers and information technology has raised new personal challenges in today’s world. All our personal information be it our health data, financial information, demographic information or our children’s information, has become digitized and is stored in the servers which are beyond our control. The Fourth Amendment toRead MoreBiometrics Of The Criminal Justice System1622 Words   |  7 Pagesmany different career fields. Is it effective and accurate? One may ask how effective and accurate is biometric technology? Well to give you an idea of its effectiveness and accuracy, biometrics is currently being used by law enforcement agencies across the world. The first type of biometrics used by law enforcement agencies was fingerprinting, which began almost a century ago (Coleman, 2000). Finger prints are one of the most common biometric modality due to the fact that no two fingerprints areRead MoreThe Ethical Implications of Cloud Computing on Society1724 Words   |  7 Pageslong-term solution may require international regulations adopted by countries where the data centers are located (Marinescu, 2012). Another area of risk that businesses and consumers should be aware of is accountability, particular as it relates to security, privacy, and trust. Companies who outsource their IT may no longer know exactly where each piece of their infrastructure is stored or managed, and as a result the lines between the organizations IT border and accountability are blurredRead MoreDisney Paper1485 Words   |  6 Pageshas created instantaneous recognition by ear and sight across the globe. In this essay, Team D will analyze financial data for Disney. Team D will assess Disney’s ethics and compliance, pronounce the procedures to safeguard ethical behavior, explain the financial market, identify the methods the company is required to use to conform to SEC regulations and evaluate Disney’s financial performance during the past two years. Disney’s role of ethics and compliance is a critical one that starts from theRead MoreUsability, Interaction, And Visualization1090 Words   |  5 Pages(Agostinho et al., 2015, p. 5). This shows the international concern for having infrastructures and standards that can interact across physical borders. The future indicates increasing sharing of knowledge and resources, in order to come up with standards and systems that can make ICTs more interoperable, including backward interoperability. Human Learning and Continuous Education The future of human learning affects trainee job performance and adult learning across organizational levels. The trends includeRead MoreModern World Relies On Technology1045 Words   |  5 Pagesfiscal year 2015. The Indian IT infrastructure field includes market of server, storage, and networking equipment. As per Gartner, Four percent of growth in field is expected to touch US $ 1.9 billion in Fiscal year 2014. In addition, the International Data Corporation says, the servicing field industry is expected to growth on the rate of 8.4 percent to US $ 7.88 billion in fiscal year 2014. In chart 2, the data shows the progress of IT field is higher in India with compare to the United StatesRead MoreEssay on Privacy vs. Security2616 Words   |  11 PagesPrivacy vs. Security Introduction Pictures seen in homes across America and throughout the world of American symbols in flames and crashing a quarter mile to the ground changed the world forever. The worlds last and only superpower had been attacked in a way only conceivable in a Hollywood script. However, the physical destruction that resulted was not necessarily the biggest loss that the United States faced. The emotional destruction of Americans could be considered much greater and canRead MoreImpact and Effects of European Immigration2031 Words   |  9 Pagesprotection while reasserting important measures against discrimination based on gender, race and colour. The European Union as an international actor seeks to become a pioneer of human rights protection – unfortunately however, there are a number of issues it has so far failed to address in this regard. According to the 2013 Annual Report by the human rights NGO Amnesty International, human rights violations occur in several European countries. A particularly controversial area of policy making concernsRead MoreEssay on Sweden’s Position on Personal Privacy in Cyberspace3546 Words   |  15 PagesSweden’s Position on Personal Privacy in Cyberspace The Internet and computer age has enabled people to work faster and more efficiently, with practically unlimited access to information. As much as the technology boom has made our lives easier, as with most good inventions, there is some negativity that must be dealt with. The dissemination of information on the global network has put personal privacy at risk. Obviously, we are not going to give up new technologies that enrich human life forRead MoreEthics of Information Communication Technology (Ict)27618 Words   |  111 Pages239 ETHICS OF INFORMATION COMMUNICATION TECHNOLOGY (ICT) Paper prepared by Tengku Mohd T. Sembok, Universiti Kebangsaan Malaysia for the Regional Meeting on Ethics of Science and Technology 5-7 November 2003, Bangkok UNESCO Regional Unit for Social Human Sciences in Asia and the Pacific (RUSHSAP) 241 ETHICS OF INFORMATION COMMUNICATION TECHNOLOGY (ICT) 1. INTRODUCTION Globalization and digital convergence in the emerging knowledge society has raised complex ethical, legal and