The experiment safe Essay Example for Free

The experiment safe Essay In every day lives we come across a number of different objects that are bouncing, colliding and in motion. All these are attributable to the energy changes involved in the process thus obeying the law of conservation of energy. The law of conservation of energy states that energy can neither be created nor destroyed and that the sum total of energy in this universe remains constant. This scientific method of looking at energy changes can be associated and implemented on a variety of simple things and one among them being observation of bouncing objects. This motivation has lead me to investigate, understand and analyse bouncing of a ball on a surface. However, understanding the bouncing mechanism is not as simple as it appears, because there are several factors involved during the bouncing action. For example, the material of the ball, the type and nature of surface over which it freely falls, frictional factors due to air resistance, temperature affecting the surrounding air molecules as well as during the ball-surface interactions. Preliminary Investigation Looking around practically made me notice a variety of different types and sizes of balls. There were golf balls, tennis balls, footballs, sponge balls, cricket balls, bouncy balls, etc. I observed them carefully and noticed that none were similar in any way. The cricket balls were the only ones made out of leather, the bouncy balls were made out of dense rubber, and the golf balls were made of plastic. I tried to test the bounce of these balls on different surfaces like carpeted flooring and wooden flooring. I found that each ball when dropped on these flooring was bouncing to different heights. I felt that each of these balls when dropped on a given flooring surface had different factors that influenced their bounce. Also I noticed that the ball being dropped constantly bounced almost at the same height. This made me feel that I could use this as my chosen experiment for further investigations. As mentioned earlier, the bouncing of balls may look simple, but the energy conversions are quite complex. In simple terms, the work done during a bouncing ball system involves three possible energy sources, 1) Gravitational potential energy (energy due to its position) 2) Kinetic energy (energy due to its motion) 3) frictional energy (lost due to production of heat and sound). The ball acquires Gravitational Potential Energy because of its position and also the ball is working against the gravity to acquire this position. Kinetic energy is gained during the motion of the ball. The frictional energy is lost due to the production of heat and sound. In fact, the conversion of the potential energy results in the kinetic energy of motion until the bounce is over and this potential energy is regained as ball acquires the next position or height. However, on each bounce over a given surface energy of impact is transferred to the surface on which it bounces. Also energy is used up in over coming the air resistance. The energy of impact can be split into sound energy, heat energy or light energy (spark) in the case of very heavy balls (for ex. Iron balls striking iron plate surfaces). This can be totally called as frictional energy loss. The process of bouncing continues with frictional loss occurring on each bounce and this effect could be known as damping. Damping means the loss of height on each bounce on a given surface. The damping effect decreases until the ball attains the minimum potential energy. The damping effect influences the speed and so it tends to slow down the ball each time it impacts the surface. To observe this effect experiments were planned to drop large bouncy balls on different surfaces and to note the rebound heights. Preliminary Results Bounce Quality Number Balls used Carpet flooring Wooden flooring 1 Golf Ball Low Medium 2 Tennis Ball Medium Medium 3 Football Low Low 4 Sponge Ball Low Low 5 Cricket Ball Low Low 6 Bouncy Ball Medium High Below are the formulae of different types of energy and work done: Potential Energy: PE = mgh 1) Where, m= mass of the ball (kg) g= acceleration due to gravity () h= height of the bounce(m) Work Done: Wd = F x d -(2) Where,F= Force (N) d = bounce height (m) Also as part of my preliminary work I did some work using a CD Called Science Investigations. This was very useful as I could see how the ball rebound height would differ if I changed the temperature of the ball. The ball being used was a squash ball. The results I gained were as follows (assuming that the drop height was kept the same-1metre): Temperature(i C) Rebound height(cm)Â   (The rebound height was measured from the bottom of the ball. ) As you can see, these results seem fairly realistic and accurate. As the temperature inside the squash ball increased, the rebound height increased. This was the case in all of the tests. Also using this CD I could investigate the different amounts of energy bring used up when a ball bounces. A ball has 100% gravitational potential energy when it is in your hand. As soon as you release it the amount of gravitational potential energy decreases and instead, 100% Kinetic energy is formed. However, when the ball hits the ground there is no kinetic energy or gravitational potential energy. Instead, there is only elastic potential energy and heat/sound energy. After the ball hits the ground, kinetic energy is regained again, but it is not a full 100%, it is only 80%. 20% of the energy was used up as heat/sound energy. So when the ball is caught in your hand again, the gravitational potential energy returns, but there is only 20% of what there previously was, so the ball does not reach its drop height. Safety: To make the experiment safe, I will have to make sure of the following: That the nail that supports the ball is tightly secured in its position. That the balls are used in a proper manner in all situations. The equipment like the clamp and stand are fixed to the workbench securely. To make this test fair I will have to make sure of the following: That the metre rule is straight and not at an angle. That I release the ball from the given point. E. g. Place the bottom of the bouncy ball in line with the one metre mark, the 0. 8 metre mark etc. Just release the ball without adding any extra force. Keep the temperature in the room constant. Make sure that there is very little air movement. Make sure that you have the same experimental conditions for all the three trials. The factor I will be investigating is the height I drop the ball.

The Assessment of Society in Jonathan Swifts Gullivers Travels :: Gullivers Travels Essays

  Ã‚  Ã‚   "In its most serious function, satire is a mediator between two perceptions-the unillusioned perception of man as he actually is, and the ideal perception, or vision, of man as he ought ot be," (Bullitt, 3). Likewise, "misanthropy" can be understood as being the product of one of two world views: 1) The Pure Cynic or Misanthropist has no faith in human nature and has given up on any notion of ideals. This type lies and manipulates as a matter of course and these are the types that tend to run the world. 2) The "Burned" or Disillusioned Idealist's misanthropy arises out of disappointment in humankind. In many ways, the second type exhibits more bile as he is constantly frustrated by what men do as opposed to what they ought to do. Jonathon Swift is the second type of misanthropist and Gulliver's Travels is arguably his greatest satiric attempt to "shame men out of their vices" (Ibid., 14) by constantly distinguishing between how man behaves and how he thinks about or just ifies his behavior in a variety of situations. Pride, in particular, is what enables man to "deceive himself into the belief that he is rational and virtuous when, in reality, he has not developed his reason, and his virtue is merely appearance," (Ibid., 66). This satire works on so many levels that a paper such as this allows me to deal with only three elements, and in a necessarily superficial way: the ways in which the structure and choice of metaphor serve Swift's purpose, a discussion of some of his most salient attacks on politics, religion, and other elements of society, and his critique on the essence and flaws of human nature. Swift's purpose was to stir his readers to view themselves as he viewed humankind, as creatures who were not fulfilling their potential to be truly great but were simply flaunting the trappings of greatness. Gulliver's Travels succeeds in this goal brilliantly. The form and structure of the whole work enhanced Swift's purpose, as did the specific metaphors in each of the four voyages. Firstly, Swift went to great pains to present Gulliver's Travels in the genuine, standard form of the popular travelogues of the time. Gulliver, the reader is told, was a seaman, first in the capacity of a ship's surgeon, then as the captain of several ships. Swift creates a realistic framework by incorporating nautical jargon, descriptive detail that is related in a "factual, ship's-log" style, and repeated claims by Gulliver, in his narrative, "to relate plain matter(s) of fact in the simplest manner and style.

Being a Rich and Fabulous CEO Essay

CIMB Wealth Advisors (CWA) was incorporated in 1990. Since then, they have becoming among the top ranking in the wealth management and financial service industry. It provides a complete financial system with comprehensive solutions for wealth management for their client. On June 6 2013, CWA team successfully carried out a career talk for the student of INTI International University & College, Subang Jaya. Everyone can take part in this career talk especially to those who taking business course. The talk started at about 2:30pm with the master of ceremonies by one of our college student. She gave us a short background of the talk later. The MC then introduced the Vice president of CWA, John Lau. He started to explain to us the topic of the talk. The title of the talk was â€Å"Being a Rich and Fabulous CEO†. The purpose that having this talk with everyone is telling us the way and tips to become a successful CEO although just a normal business man. Firstly, he explain to us what’s CWA helping to us. He also let us know how much income that every level class of worker or manager earning every year. Beside that, he told us need to set a goal for our future. Instead, he let us know what attitude and personality that every successful person that must have. For example, do not order others people doing something else, but the best one is listens to the comment or feedback and do something on it. Every successful CEO or leader must listen to others in order to let other people to listen on you. Become a CEO was a dream of every human, but dream without action, dreams still remains dreams. The speech was finish in 35mins. After that, we having the â€Å"role playing game†. We separated to few small groups. The rules was create a new company with one CEO. CEO must be chosen in one of us inside the group. Then, we have to create a new plan for our company. Beside of that, the plan must be persuade the judges to sign up for our plan. The power of teamwork has shown when we giving our best idea to each other. The ability and the spirit of leadership are important for group or maybe a company. This talk help us a lot in what are the ways we need to do when we graduated and also planning our future from now on. There is no such thing as a free lunch, so we must start from the low.

Why Is It The Interest Of United Law - 3517 Words

Why is it in the interest of states to obey International Law? ABSTRACT A growing discussion amongst IR scholars and International legal scholars alike has been the debate on if International law (IL) is really law especially since it lacks the basic characteristics of domestic law. Is international law a law just in name or in action also? If it is a law, do states obey this Law? And why will it be in the interest of a state to obey such law (if it does exist). This essay is an attempt to explain what IL is and to point out likely reasons why it is in a state interest to obey IL. This essay is drawn largely from work written by various scholars at different times to draw my conclusion INTRODUCTION: All states in the contemporary international system, both great and small, are compelled to justify their behaviour according to an international legal framework. Although Goldsmith Posner (2005:4) contended that due to the fact that most academic work on International Law has been written by Law Professors, they explained that these scholars have all shared an assumption which is not empirical enough, these assumptions drawn from the international rules of opinion juris (the â€Å"sense of legal obligation† that makes customary international law binding) and pacta sunt servanda (the rule that all treaties must be obeyed) They however opined that Contemporary international law scholarship does not deny that states have interests and they try to pursue them. This essay seeks toShow MoreRelatedWhy Is It The Interest Of United Law?3517 Words   |  15 Pages Why is it in the interest of states to obey International Law? ABSTRACT A growing discussion amongst IR scholars and International legal scholars alike has been the debate on if International law (IL) is really law especially since it lacks the basic characteristics of domestic law. 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Ideally, they are highly organized groups, composed of citizens that lobby in different ways for a cause. There are literally thousands of different groups in the United States, each putting forth much time and effort for their supporters. This paper will discuss the different types of interest groups, as well as how and why they exist. Without theseRead MoreChinas Expansion Into The South China Sea Case Study1351 Words   |  6 Pagesinternational law, disrupts naval activities in the region, also the issue is creates tension in between the U.S. and China. Reflecting on the history of U.S. Foreign Policy and its policy of protecting U.S. interests, freedom of trade, and freedom of the seas, would it be in the U.S. best interest to further address China’s expansion into the South China Sea? I believe that the U.S. should take a stance against China’s expansion into the South China Sea to further enforce that international law is upheld