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Search results 4591 - 4600 of 8618 matching essays
- 4591: Radon
- ... According to quantum mechanics, electromagnetic radiation may be viewed as made up of photons. Acoustic radiation is propagated as sound waves. Examples of particle radiation are alpha and beta rays in radioactive, and cosmic rays. (American Heritage Dictionary of the American Language, Third edition, 1992) It is chemically inert and does not combine with other chemicals or elements. Traces of radon are normally found in the atmosphere near the ground as the result of seepage from ...
- 4592: Devastation of the Rain Forests
- ... land or burns more of the rain forest and converts it to pastures. The U.S. does not offer much help; the destruction of the rain forests takes five cents off the price of an American hamburger. The United States buys up three-quarters off all Central American beef exports. Perhaps after all there are more criminals than we think; the US is also responsible for the devastation of mankind. Maybe the South Americans just support our greediness and "necessity" for food, which ...
- 4593: Apollo 4
- ... Apollo 4 On January 27, 1967, the three astronauts of the Apollo 4, were doing a test countdown on the launch pad. Gus Grissom was in charge. His crew were Edward H. White, the first American to walk in space, and Roger B. Chaffee, a naval officer going up for the first time. 182 feet below, R.C.A technician Gary Propst was seated in front of a bank of television ... spite of a 100 percent oxygen atmosphere, inadequate provisions for rescue, and a three layer, ninety plus second hatch. The Challenger had faulty O-rings, icicles, and bad management which threatened to bring the entire american astronaut program to an end. Over a billion dollars was lost all together. Both disasters could have been prevented if the time, effort, and funding was spent. Many people involved in both disasters were either ...
- 4594: Mercury
- ... that of the earth and it’s average density is approximately equal to that of the earth. Mercury’s magnetic field is one-hundred times weaker than that of Earth’s. Mercury has the shortest revolution of all the planets in our solar system and revolves around the sun in about eighty-eight days. Radar observations of the planet show that its period of rotation is 58.7 days, or two-thirds of its period of revolution. That means that Mercury has one and one-half days in it’s year. Mercury doesn’t have an atmosphere, but it does have a thin layer of helium. The helium is actually solar wind ...
- 4595: Extra Sensory Perception
- ... century ago. Scientists have run thousands of experiments to learn if minds indeed have supernatural powers. Most tests investigated one of the three main "faculties": telepathy, clairvoyance and precognition, collectively called extrasensory perseption (ESP) by American psycologist J.B. Rhine. Dating from the early 1930s, Rhine's tests at Duke University at Durham, North Carolina, remain the most quoted examples of an expirimental blitzkreig on problems of parapsychology. Three years of ... you have found out wich area of ESP is your strongest, you should retest that area every once a nd a while. TEST NUMBER 2 This experiment is called a Direct Image Tranference Test. An American novelist, Upton Sinclair, used this test to test hids wife, Mary of her phsycic abillities. Mary would go in a seperate room and sit down and concentrate. Upton would then open a dictionary at random ...
- 4596: Hypotheses of the Effects of Wolf Predation
- ... does not create a cumulative impact on the nutritional status of deer and moose. All of the four proposed theories mentioned above could describe the interrelationships between the predation of wolves and their usual north american prey of large ungulate species. There has been ample evidence presented in the primary research literature to support any one of the four potential models. The predation limiting hypothesis seems to enjoy wide popular support ... Social organization, spatial distribution, and population density of wolves in relation to moose density. Canadian Journal of Zoology. 63: 1068-1077. Messier, F.. 1994. Ungulate population models with predation: a case study with the North American moose. Ecology. 75(2): 478-488. Seip, D.. 1992. Factors limiting woodland caribou populations and their interrelationships with wolves and moose in southeastern British Colombia. Canadian Journal of Zoology. 70: 1494-1503. Thompson, I. D ...
- 4597: The Cambrian Period
- ... the firs t appearance of abundant fossils especially Trilobites, which characterizes a succeeding point in time. During the Cambrian Period the lapetus Ocean appeared, the predecessor of the Atlantic Ocean, which separated the young North American and Eurasian continents. Also Gondwanaland was in the final stages of development. Gondwanaland was a very large continent made up of what is now South America, Africa, Arabia, Madagascar, India, Australia, and Antarctica. Large shelled ... emerged during the Cambrian. Also Earth¹s atmosphere contained the same amount of oxygen as it does now, enough to sustain the metabolic rate of a complex organism. Running down the middle of the North American continent was a large inland sea called the Saulk sea. Inhabiting this sea, and the other seas of the primitive world, were Trilobites and Brachiopods . Trilobites were three - lobed arthropods, unlike other arthropods Trilobites had ...
- 4598: Frogs
- ... The Bullfrog is one of the largest true frogs in North America (Barker 150). It weighs up to 1.2 pounds and has a total length of 15 inches. One of the most common North American species is the leopard frog (Barker 154), which is easily recognized by the numerous black, often light-edged spots on the back and legs. Most true frogs stay close to ponds and streams, but the North American wood frog (Stebbins 135), a small redish-brown species with mask-like black bands on the head, wander far away from the water. The green frog is another common species in North America and despite ...
- 4599: An Argument For Animal Research
- ... cats, dogs, farm animals, dolphins, and monkeys which account for less than 1 percent of the experiments, yet it seems 99 percent of their advertising and campaigning deal with this one percent. At least the American public realizes even those who portray ethical righteousness can be wrong. For instance, " an American Medical Association ( AMA ) poll found that 77 percent of adults think that using animals in medical research is necessary." ( ¯The Wall Street Journal®, "Animals and Sickness", Page 378.) It is a curious thing to see ...
- 4600: Sacred Cow, Holy Bull
- ... and many people do not understand why other citizens are causing a fuss. They claim that they are not selling beef, so why should anyone be upset (Cooper 1). Many activists have been against the American business in their country. They do not want McDonalds to prosper in a poor country by selling junk food. Regardless if McDonalds is selling beef or not, they feel an American country shouldn’t be doing business there. Through Indian eyes, McDonalds would seem like an killer. “I am against McDonalds, because they are the chief killers of cows in the world. We don’t need ...
Search results 4591 - 4600 of 8618 matching essays
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