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Search results 12961 - 12970 of 22819 matching essays
- 12961: Uranium
- ... well educated german chemist. Klaproth, having extracted from pitchblende what he called 'a strange kind of half metal' (he had only isolated its oxide), he resisted the temptation to give his own name to the new element, which was quite customary at the time. William Herschel gave uranium its name from the last planet founded in are solar system at the time, he named it Uran, which in its final form ... of disintegration. Radium is the fifth radioactive descendant in the chain from uranium to lead, its daughter is the gas radon, and polonium is the last radioelement before lead. The discovery of Uranium changed the world as we knew it, from its physical and chemical properties we came about the X-ray, following down the line, chemists and scientists used Uranium to make weapons of mass destruction, (i.e the Atom ...
- 12962: Animal Testing: Animals Suffer
- ... it has. That is false because studies have been done by professionals on ten infectious diseases in the U.S. and in every case except poliomyelitis the death rate had already fallen dramatically before any new form of medical treatment was introduced (Singer, 405). It is simply not a strong enough argument to say that our mortality rate has decreased, because there is no actual evidence to prove it. Singer argues that medical interventions have only a small effect on the mortality rate. He says more money and focus should be set aside for health care and the major health problems of the world. That is the only reasonable and at the same time justifiable step to take care of the entire animal rights issue. Cohen, the author of a piece called The Case for the Use of Animals ...
- 12963: Destruction of the Ozone Layer
- Destruction of the Ozone Layer Concern with the environment is being voiced by people throughout the world. Today, it is not unusual to read about environmental problems. One problem that is important to all of us is the depletion of the ozone layer. One question being asked is, does the depletion of ... winter and not just over Antarctica, but over other countries such as the United States. Many countries are starting to take steps to help reduce the depletion of the ozone. However, all countries in the world need to do more. "Ozone is a form of oxygen that is present in the Earth's atmosphere in small amounts." The presence of ozone makes it possible for life on Earth. Ozone is made ... There is now evidence that shows that protective gear can help shield humans from the harmful effects of ozone depletion. However, this is not a permanent solution. Perhaps the best solution involves nations throughout the world working together to stop ozone depletion. The United States has taken some steps that will help with ozone depletion. In 1978, the use of CFC propellants in spray cans was banned ("Some Commonly Asked ...
- 12964: The Giraffe
- The Giraffe My science project is on Giraffes. The Giraffe is the tallest mammal in the world. Giraffes have very long necks with a short, upstanding mane, high shoulders which slope steeply, and long legs that are nearly equal in length. The male weight can range to 2420-4250, and the female ... to be a huge camel, with spots like a leopard. But later learned the Giraffe has neither these animal combinations. The way Giraffes give birth is standing up, they can even do it while sleeping. New born calves, which are baby giraffes, begin their lives by falling 6 feet to the ground. Usually a calve stands 6 feet tall and is able to stand after birth. They are highly attuned to ...
- 12965: Chlorofluorocarbons (CFCs)
- ... net effect on climate is unclear. The strength of the indirect effect of ozone depletion depends on variables such as temperature of the upper atmosphere and cannot yet be measured with any confidence. According to new research, however, it is possible that the indirect effect of CFCs cancels out some or all of the direct effect of their being powerful greenhouse gases. CFCs are generally colorless, odorless, and non-toxic. They ... spring times. The Stratosphere ozone forms a protective layer that blocks out the sun's ultraviolet (UV) rays that cause skin cancer and other cell damage. In response to this weakening shield, most of the world's CFC users adopted the "Montreal Protocol" in 1987. This treaty commits nations who signed it to phase out CFC use by the year 2000. In November of 1992, growing fears of the ozone depletion ...
- 12966: The History of Carbon
- ... substances may pass from organism to organism, eventually these too are oxidized and form carbon dioxide and water as cells wear out and are broken down, or as the organisms die. In either case, a new set of organisms, ranging from fungi to the large scavengers, use the waste products or tissues for food, digesting and oxidizing the substances for energy release (WWW 1). At various times in the Earth's ... today has some connection with carbon or a carbon compound. Carbon is in every living organism. Without carbon life would not exist as we know it. Works Cited 1. Beggott, Jim Great Balls of Carbon New Scientist, July 6, 1991 2. Kinoshita, Kim Carbon Compounds Random, New York 119-275 1987 3. WWW Carbon http://www.usc.edu/chem/carbon.html 1995 4. WWW Carbon Compounds http://www.harvard.edu/depts/chem/carbon.html 1995
- 12967: Maya Angelou 5
- ... lasted until the late 1930 s. The effects varied, but everyone suffered. By 1933, nearly one quarter of the workforce had been laid off. By 1934, two fifths of home owners lost their houses, and New York listed 100 deaths from starvation. About 37% of American had irregular eating habits, and generally did not get three meals a day. Only about 8% were getting only one meal a day, and this ... abroad. She is also a Reynolds professor of American Studies at Wake Forest University in North Carolina. Through her writings as well as her activism toward the cause of improving conditions for women in Third World Countries (particularly Africa), Maya continues to shed light on the possibilities for victory that can accompany seeming defeat. Maya stresses to her students that reading, especially African- American literature reinforces to us that what has ...
- 12968: Mccarthyism
- ... joined the newly created Senate Housing Committee, and he took a nationwide road tour to accentuate his point. He continued in this way until the end of 1949, when he determined that he needed a new subject to put his name in the headlines and to use as a base for his reelection in 1952. He found his next subject one night in early 1950, at the Colony Restaurant in Washington ... time researching these "81 of those whom I consider to be Communists in the State Department." He was a master manipulator of the press. His name was constantly in the headlines under such articles as "NEW McCARTHY INVESTIGATIONS BEGIN" or "McCARTHY OUTLINES NEW REDHUNTING PLAN." Although reporters followed him everywhere and his hearings were constantly televised, he was voted "worst senator" in a poll of the press. He can be compared to O. J. Simpson, as there ...
- 12969: Insulation
- ... It has a rough appearance and is most suitable for blankets, overcoats, and tweeds. Denim which the experimenter is also testing is the material used to make blue jeans and is currently one of the world's most popular fabrics. It is fairly heavy and is made with a blue cotton warp and a white cotton filling (Groilers, 1996). The thermal underwear is duofold, with an outer layer made of 65 ... study can be the effect of the amount of layers of insulation on how much heat is retained. Bibliography ______. "Wool". Word Search. Groliers. 1995. ______. "Cotton". Netscape. 1995. Bochinski, Julianne, Science Fair Projects, Wiley Science Editions, New York, 1991
- 12970: Copper
- ... B.C and 1100 B.C became known as the bronze age. Today, some of the leading states of the copper industry are Arizona with 747,000 short tons, Utah with 187,000 short tons, New Mexico with 161,000 short tons. Some other leading countries are Chile with 1,422,000 short tons, United States with 1,203,000 short tons, Soviet Union with 650,000 short tons, and Zambia ... damp air for long periods of time, a green film will coat the copper, called patina, which will protect it from further corrosion. Since copper is one of the most widely used metals in the world we use it for a lot of things. Copper gives us water heaters, boilers and cooking utensils. It is used for out door power lines, cables, lamp cords, and house wiring. Electrical machinery like generators ...
Search results 12961 - 12970 of 22819 matching essays
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