The Physics Of Scuba Diving Swimming with the Fish Essay Example For Students

The Physics Of Scuba Diving: Swimming with the Fish Essay The Physics Of Scuba Diving: Swimming with the Fish Essay Have you ever wondered what it would be like to swim with the fish and explore the underwater jungle that covers two-thirds of the earths surface? I have always been interested in water activities; swimming, diving and skiing, and I felt that scuba was for me. My first dive took place while on a family vacation. I came across a dive shop offering introductory dives, which immediately caught my interest. After much convincing (my parents), with my solemn assurance that I would be careful, I was allowed to participate in a dive. I was ready, or so I thought. We will write a custom essay on The Physics Of Scuba Diving: Swimming with the Fish specifically for you for only $16.38 $13.9/page Order now The slim basics such as breathing were explained and I was literally tossed in. Sounds easy enough, right!, well WRONG!!. From the moment I hit the water, my experience was much less than fun. I quickly sank to the bottom into a new world, with unfamiliar dangers. I really wasnt ready for this experience. I was disorientated, causing me to panic, which shortened the length of my dive, not to mention my air supply. Lets just say I would not do that again. To start exploring the underwater world, one must first master a few skills. Certification is the first step of learning to dive. From qualified professionals one must learn how to use the equipment, safety precautions, and the best places to dive. This paper is designed to help give a general understanding of the sport and the importance that physics plays in it. Self- contained Underwater Breathing Apparatus, or SCUBA for short, is a hell of a lot of fun. However, there is considerably more to Diving than just putting on a wetsuit and strapping some compressed air onto ones back. As I quickly learned, diving safely requires quite a bit more in terms of time, effort, and preparation. When one goes underwater, a diver is introduced to a new and unfamiliar world, where many dangers exist, but can be avoided with proper lessons and understanding. With this knowledge the water is ours to discover. The Evolution of Scuba Diving Divers have penetrated the oceans through the centuries for the purpose of acquiring food, searching for treasure, carrying out military operations, performing scientific research and exploration, and enjoying the aquatic environment. Bachrach (1982) identified the following five principal periods in the history of diving which are currently in use. Free (or breath-hold) diving, bell diving, surface support or helmet (hard hat) diving, scuba diving, and, saturation diving or atmospheric diving (Ketels, 4) SCUBA DIVING The development of self-contained underwater breathing apparatus provided the free moving diver with a portable air supply which, although finite in comparison with the unlimited air supply available to the helmet diver, allowed for mobility. Scuba diving is the most frequently used mode in recreational diving and, in various forms, is also widely used to perform underwater work for military, scientific, and commercial purposes. There were many steps in the development of a successful self-contained underwater system. In 1808, Freiderich yon Drieberg invented a bellows-in-a-box device that was worn on the divers back and delivered compressed air from the surface. This device, named Triton, did not actually work but served to suggest that compressed air could be used in diving, an idea initially conceived of by Halley in 1716. (Ketels, 9) In 1865, two French inventors, Rouquayrol and Denayrouse, developed a suit that they described as self-contained. In fact, their suit was not self contained but consisted of a helmet-using surface-supported system that had an air reservoir that was carried on the divers back and was sufficient to provide one breathing cycle on demand. The demand valve regulator was used with surface supply largely because tanks of adequate strength were not yet available to handle air at high pressure. This systems demand valve, which was automatically controlled, represented a major breakthrough because it permitted the diver to have a breath of air when needed. The Rouquayrol and Denayrouse apparatus was described with remarkable accuracy in Jules Vernes classic, Twenty Thousand Leagues Under The Sea, which was written in 1869, only 4 years after the inventors had made their device public (Ketels, 10). .u1d3fd824d50aefd9786968c2551b74cc , .u1d3fd824d50aefd9786968c2551b74cc .postImageUrl , .u1d3fd824d50aefd9786968c2551b74cc .centered-text-area { min-height: 80px; position: relative; } .u1d3fd824d50aefd9786968c2551b74cc , .u1d3fd824d50aefd9786968c2551b74cc:hover , .u1d3fd824d50aefd9786968c2551b74cc:visited , .u1d3fd824d50aefd9786968c2551b74cc:active { border:0!important; } .u1d3fd824d50aefd9786968c2551b74cc .clearfix:after { content: ""; display: table; clear: both; } .u1d3fd824d50aefd9786968c2551b74cc { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u1d3fd824d50aefd9786968c2551b74cc:active , .u1d3fd824d50aefd9786968c2551b74cc:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u1d3fd824d50aefd9786968c2551b74cc .centered-text-area { width: 100%; position: relative ; } .u1d3fd824d50aefd9786968c2551b74cc .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u1d3fd824d50aefd9786968c2551b74cc .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u1d3fd824d50aefd9786968c2551b74cc .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u1d3fd824d50aefd9786968c2551b74cc:hover .ctaButton { background-color: #34495E!important; } .u1d3fd824d50aefd9786968c2551b74cc .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u1d3fd824d50aefd9786968c2551b74cc .u1d3fd824d50aefd9786968c2551b74cc-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u1d3fd824d50aefd9786968c2551b74cc:after { content: ""; display: block; clear: both; } READ: A Sad Day EssaySemi-Self-Contained Diving Suit The demand valve played a critical part in the later development of one form of scuba apparatus. In the 1920s, a French naval officer, Captain Yves Le Prieur, began work on a self-contained air diving apparatus that resulted in 1926 in the award of a patent, shared with his countryman Fernez. This .

goals of psychological research essays

goals of psychological research essays III. The four goals of psychological research are to describe, explain, predict, and control the issue. The first goal of psychological research is the method to describe each behavior and the circumstances it brings about. The goal following describe is the goal to explain. The need to know why the behavior occurs is essential. Another psychological research is to predict. Comprehending a behavior is to know when it will happen or what are the results. The final goal of psychological research is the goal to control behavior (Heiman, 1999). IIIB. Heiman (1999) discussed that scientific evidence is obtained through empirical, objective, systematic, and control research. Empirical is types of evidence that can be obtained by observation. Observing of events will bring upon knowledge of this evidence. Everyone will partake is having the same beliefs regarding these observations. Objectivity is type of scientific evidence is obtained through the observation of the same event but still have different impression. Observations must be free from bias. Systematic is the ideas that research observation are obtained in a methodical, step-by-step fashion. The use of systematic determines the role of each factor and combination of factors as they apply to a behavior. Controlled research is another way to simplify the situation by eliminating any extraneous factors that might influence the observed behaviors, which in turn, creates confusion. Create a clearly defined situation in which to observe only the specific behavior and the relevant factors that interest them are the main importance (Heiman. 1999). VI. Scientific hypothesis must be testable, falsifiable, precise, rational, and parsimonious. Testable, which means that the test can show that the hypothesis is false. Precise is the requirements that a scientific hypothesis should hold terms that are distinctly defined. Rational is the necessity that a scientific hypothesis should rea ...

To Build A Strong Brand Within The Fashion Industry Essay

To Build A Strong Brand Within The Fashion Industry - Essay Example The essay "To Build A Strong Brand Within The Fashion Industry" explores how to build a strong brand in the fashion industry. The adoption of multiple case studies design in the analysis is because the design produces more compelling evidence than single studies, in addition to providing stronger basis for construction of the theory. Zara is a Spanish retailer of clothing and accessories that is part of Inditex group with its base in Arteixo, Galicia. Since its debut in the fashion industry, the company has risen to the top and is currently one of the main stakeholder brands in fashion worldwide. Contrary to the fashion industry product development period of six months, the company has found efficient production processes that enable it to come up with a new product and release it to the store shelves in just two weeks. This has been one of the key strategies to its growth worldwide. With such an approach, the company has so far won the war of transferring its production aspects to l ow cost countries like China that is currently the wide trend by top fashion brands in the industry. The company currently has a large distribution network with 1751 stores worldwide trading as Zara and an extra 174 doing business as Kiddy’s class stores; the company’s branch for children’s clothing. The company sells 50% of its products within Spain, 26% in other European counties with the remaining 24% destined for Asia, Africa and the rest of the world. Table 4.2.2 shows how Zara has succeeded in building its brand name.

Accident Victim Essay Example | Topics and Well Written Essays - 500 words

Accident Victim - Essay Example Generally, duty of the psychiatric aide had involved the bathing of patients who were regarded as helpless. Each day, she is supposed to give nine (9) of the patients two rounds of bath – in the morning and evening. This had gone on as a daily and very normal routine till the present accident occurred. She reports that while she was giving one of patients his bath, she heard the sound of what was supposed to be struggling or fighting in the open of the inner bathroom where three other patients where waiting for their turn to both. Knowing the mental condition of the patients as not too stable, she rushed out to go and see what the problem was. She reports that normally the patients formed a queue and waited for their turns to be bathed. She acknowledges that the patients enjoy the bathing section and so there is normally brawl over who takes the first spot on the queue. When she went to see what was happening, it was reported to her that one of the guys was trying to jump the queue. As she was taking explanation from the person supposed to be the complainant, the accused suddenly pushed the complainant. She said she tried catching the patient who was pushed so that he could not fall but unfortunately, she fell together with the patient. The accident took place on the 6th of September. Because she was trying to save the patient from falling, she was the one who fell directly on the ground with the patient who was pushed falling on her as well. The fall resulted in fracture. Events leading on has made the doctor diagnose her with osteoporosis, which is explained by the New York City State Department of Health (2011) as â€Å"a disease that causes bones to become thin, weak and break easily.† This condition caused the interviewee to miss work for eleven working days because she was initially put under intensive care unit of the

Exterminate the brutes Essay Example for Free

Exterminate the brutes Essay â€Å"The Heart of Darkness† by Conrad is one of the great novels of English literature. This novel exposes the greed, malice and selfishness of the European men. They exploit the wealth of Africa in the name of civilizing the natives. They take away their ivory and in return gave them hunger, destitution, poverty, degradation and death. The English men of this novel lack morals and conscience. Conrad observed the hypocrisy of his countrymen and exposed it in a marvelous way in this short piece of art. In this novel he brings before us the nature of â€Å"western superiority† in primitive lands. Reading this story repeatedly, we know that the dark English coast before him recalls for Marlow the darkness of modern Africa, which is the natural darkness of the jungle but more than that the darkness of moral vacancy, leading to the atrocities he has beheld in Africa. This moral darkness of Africa, we learn later, is not the darkness of the ignorance of the natives, but of the Whitman who blinded themselves and corrupted the natives by their claim to be light-bearers. Walter Allen believes that, â€Å"The Heart of Darkness of the title is at once the heart of Africa, the heart of evil- everything that is nihilistic corrupt and malign – and perhaps the heart of man† According to Conrad himself, the story of â€Å"heart of darkness† is about the â€Å"criminality of inefficiency and pure selfishness when tackling the civilizing working Africa†. In the story Marlow makes much of the inefficiency and selfishness he sees everywhere along his journey in Africa. But it is the criminality of the civilizing work itself that receives the heaviest emphasis in the novel as a whole. J. W. Beach believes that Kurtz is the representative and dramatization of all that Conrad felt of futility and horror in what the Europeans in the Congo called â€Å"progress†, which meant the exploitation of the natives by the white men. Kurtz was to Marlow, penetrating this country, a name, constantly recurring in people’s talk, for cleverness and enterprise. But there were slight intimations, growing stronger as Marlow drew near to the heart of darkness, of traits and practices so abhorrent to all our notions of decency, honor and humanity that the enterprising trader gradually takes on the proportion of a ghastly and almost supernatural monster symbol for Marlow of the general spirit of this European undertaking On his journey up the Congo, Marlow comes across the forsaken railway truck, looking as dead as the carcass of some animal; the brick maker idling for a year with no bricks and no hope of materials for making them; the â€Å"wanton smashup† of drainage pipes abandoned in a ravine; burst, piled up cases of rivets at the outer station and no way of getting them to the damaged steam boat at the Central Station; the vast artificial hole somebody had been digging on the slope- all these and many more are the examples of the criminality of the inefficiency. Wilson Follet believed that in this novel, â€Å"the European is shown drained, diseased, a prey to madness and unutterable horror and death†¦Ã¢â‚¬  This proves that the white men over there, except the company’s accountant, are inefficient and selfish. They themselves do nothing, whereas on the other hand they exploit the natives to the maximum, they extract the maximum workout of them and pay them three nine –inch long brass-wire pieces a week, which are insufficient to buy them anything. As such most of the natives are starving and dying. This novel is a very faithful accord of the cruelties and atrocities perpetrated on the natives of Africa by their European masters. Talking of the roman conquest of England, Conrad says, it was â€Å"just robbery with violence, aggravated murder on a grand scale, and men going at it blind-as is very proper for those who tackle darkness†. What Romans had done in England, the English did in South Africa. Marlow admits that English conquests, like all others, â€Å"means the taking away it from those who have a different complexion or slightly flatter noses than ourselves,† though Kurtz went to the African jungle with an idea to civilize the natives; he saw his mission in Africa as that of torchbearer for white civilization. But very soon he starts extracting from the natives human sacrifices to himself as god. Finally, his hatred for the natives plunged to the depth out of which came his prescription of the only method for dealing with primitive people: â€Å"Exterminate the brutes! † The European Whitman in Africa is parasites; they are hollow; they have no personal moral vision of their inhumanity and folly. They are also collapsible, because their society’s institutions are incapable to hold them up. Ivory has become the idol of the foolish run of European pilgrims; and Kurtz is no exception. † all Europe contributed to the making of Kurtz. † Joseph Conrad is a modern artist. He uses impressionistic technique of novel writing in his novel, â€Å" The Heart of Darkness†. The appeal of a novel, Joseph Conrad wrote, â€Å"must be and impression conveyed through senses â€Å". This impression could not be conveyed through the most complete inventory of details; it is an intuitive whole and must be rendered so, instantaneously. † the meaning of an episode is not inside like a kernel but outside enveloping it,† his spokesman Marlow declared. He avoids generalized narrative. He tell us the story in vivid impressions something like Virginia wolf. E. M. Forster in his seminal novel â€Å" A Passage To India’ too discuss some what â€Å"the Heart of Darkness† like situation. This novel discusses in detail the severe clash between the two fundamentally different cultures, those of East and West. The administration and their families residing there represent the westerners. Although these western people wish to maintain good relations with the easterners whom they govern, they have no desire to understand India or Indians. The Westerners rule the natives with an iron hand without caring for justice and fair play.

World Hunger Essay -- Essays Papers

World Hunger This web page's goal is to introduce the visitor to the problem of world hunger and provide ways to access more information through books and other web sites. The page was created as a final project for an Environmental History class held at the University of Vermont spring semester 2000. Overview World hunger is one of the many dire problems facing the human race. Although the common person probably won't have a big impact on ending world hunger, but by being aware of the issues you become empowered. It is first necessary discuss some other the myths about the reasons for world hunger. World hunger is not caused by population increase, but it is one of the factors. The global grain production is high enough to feed the population, which means that supply is not a cause of world hunger. The lack agricultural land is also not a cause of hunger; many of the third world nations have the arable land needed to produce enough food to feed their people. The real cause of hunger is the inequality in the control of food production. The arable land cannot be used to grow food to feed people of third world nations because big corporations buy the land to produce cash crops for exporting. The inequality among nations was formed during colonization. The European powers sought to find land that could produce marketable crops. Small plots of land farmed by families did not produce the volume of marketable goods that would bring profit to the Europeans. Some colo...

Imposing the Minimum Wages

Minimum wage is the least amount of pay that a person receives for the job that he/she performs. The minimum wage in Massachusetts is $5.50. A job that pay†s minimum wage offers little or no opportunity for improvement. Majority of the people who work for minimum wage are students, people with little education, or immigrants. Fast food restaurants such as Burger King and Mc Donald†s are examples of jobs that pay minimum wage. The minimum wage in Massachusetts is $5.50. A job that pay†s you minimum wage usually offers little or no opportunity for improvement. Such a job offers experience in the fields of, how to make a hamburger, French fries, and chicken crisps. The only true experience you get from this type of a job is dedication. In order to show that you obtained this experience you must stick with the job for some time. People will not hire you because of the experience you have fro making French fries, but they might hire you for showing dedication. It does not come to me as a surprise that the majority of the people who work for minimum wage are either students, people with little education or immigrants. Students work because they need the job, and because they have not yet obtained real experience. People with little education work for minimum wage because that is the only job they can find, in order to have a job that pays more you either need experience or education. Immigrants who come to America may have some education but they can†t find a better job because they do not speak English. Until they learn our language, minimum wage is the only way of supporting them selves. The most common place to find a minimum wage job is a fast food restaurant. Restaurants such as Mc Donald†s and Burger King are famous for it. What made them famous is not the minimum wage but the fact that low skills are required. Since low skills are required anybody can work there. It is easy to find a job in places such as these but a price does come with it. The managers show little sympathy for scheduling. In most restaurants it†s either their way or no way. In conclusion, minimum wage is only good when it is your first or second job. If you want real experience, and better pay go through a temp agency to obtain a job in a company. The work will be hard but the paycheck will be much heavier. Imposing the Minimum Wages Minimum wage is the least amount of pay that a person receives for the job that he/she performs. The minimum wage in Massachusetts is $5.50. A job that pay†s minimum wage offers little or no opportunity for improvement. Majority of the people who work for minimum wage are students, people with little education, or immigrants. Fast food restaurants such as Burger King and Mc Donald†s are examples of jobs that pay minimum wage. The minimum wage in Massachusetts is $5.50. A job that pay†s you minimum wage usually offers little or no opportunity for improvement. Such a job offers experience in the fields of, how to make a hamburger, French fries, and chicken crisps. The only true experience you get from this type of a job is dedication. In order to show that you obtained this experience you must stick with the job for some time. People will not hire you because of the experience you have fro making French fries, but they might hire you for showing dedication. It does not come to me as a surprise that the majority of the people who work for minimum wage are either students, people with little education or immigrants. Students work because they need the job, and because they have not yet obtained real experience. People with little education work for minimum wage because that is the only job they can find, in order to have a job that pays more you either need experience or education. Immigrants who come to America may have some education but they can†t find a better job because they do not speak English. Until they learn our language, minimum wage is the only way of supporting them selves. The most common place to find a minimum wage job is a fast food restaurant. Restaurants such as Mc Donald†s and Burger King are famous for it. What made them famous is not the minimum wage but the fact that low skills are required. Since low skills are required anybody can work there. It is easy to find a job in places such as these but a price does come with it. The managers show little sympathy for scheduling. In most restaurants it†s either their way or no way. In conclusion, minimum wage is only good when it is your first or second job. If you want real experience, and better pay go through a temp agency to obtain a job in a company. The work will be hard but the paycheck will be much heavier.