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Readers Digest Sound Waves
2,571 wordsThere are many differences between Dolphins and Porpoises. People might think that the two are the same mammal, but they are not. Dolphins have cone-shaped teeth and porpoises have spade-shape teeth. The easiest way to tell them apart is that the porpoise is smaller in size and is broader across the back. Dolphins are classified in the Delphinidae species and there are thirty to fifty different kinds of species in this family (Min asian 204). The Porpoises are classified under the Phoceonidae fa...
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Killer Whales Pacific Northwest
852 wordsKiller Whale, largest member of the dolphin family. Killer whales occur in more parts of the world than probably any other cetacean (see Whale). They occur in all oceans, both in the open ocean and close to shore, but are more common in the colder, more productive waters of both hemispheres than in the Tropics. Resident populations may cover an area of several hundred square kilometers. Transient populations often move through an area rapidly, swimming more than 1000 km (more than 600 mi) along ...
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The Eye And Laser Surgery
1,557 words... pascal pulse of 250 is very long compared to other lasers. The discharge is build up in three phases: 1) X-ray pre-ionisation provides a homogeneous distribution of electrons in the discharge area. 2) A high voltage pre-pulse with a very fast rise time multiplies these electrons in an avalanche process, providing a homogeneous ignition of the discharge. Finally the main pulse gives the high current at moderate voltage to create the laser output. The energy per pulse is 1 Joule. With a repeti...
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British Museum Written Language
646 wordsMore than 5, 000 years ago, a glorious civilization called Mesopotamia arose in the area between the Tigris and Euphrates Rivers. This civilization took advantage of its countless benefits. If there were any obstacles, the Mesopotamian's adapted. Soon, great cities emerged as a result of the discovery of farming, and there was a surplus of food. Because of this surplus, not everyone had to farm, which allowed non-farming people to cull their expertise in other fields, so to say. These people cre...
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Amounts Of Food Heart Disease
805 wordsBefore contact with the western world, the Inuit were a relatively healthy population. However, the severe climate in which they resided posed challenges in maintaining health and well being. Here are some of the difficulties they faced and their adaptations to combat these problems: Avoiding Vitamin Deficiencies: The vegetation in the arctic habitat is relatively scarce. In order to prevent disease such as scurvy and rickets, and to assure calcium absorption the Inuit needed sufficient amounts ...
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Kim Jong Il Republic Of Korea
1,087 wordsWould it be in North Korea's Best Interest to Merge with South Korea? Although more than half a century has passed since the two Korean governments were established in 1948, the Korean peninsula is still divided between the Republic of Korea (ROK, or South Korea) and the Democratic People's Republic of Korea (DPRK, or North Korea). Inter-Korean relations are still characterized by mutual distrust, animosity, a lack of mutual cooperation, and conflicting ideologies. The cold war continues on the ...
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Exxon Valdez Oil Spill
822 wordsThe Exxon Valdez is an American oil tanker that went aground on a reef in Prince William Sound, Alaska, on the night of March 24, 1989. The nine hundred and eighty seven-foot tanker ran aground on a reef and started to leak oil. The leakage continued for two days, totaling eleven million gallons the largest oil spill in U. S. history. The tankers remaining 1 million barrels of oil were removed from the hold of the damaged vessel and transferred to other tankers operated by the Exxon Company. The...
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Vertical Lines Business Transactions
805 wordsThe object in question is marked as a Syrian, Bronze Age, stone label seal (c. 3 rd- 2 nd millennium). Most of the seals I have viewed have much more representational forms on them than this object has. I have not been able to find any books which have pictures of items with this name, which leads me to believe that it has been marked wrong. The object resembles a small, oval shaped bead with indentations in the centers of the longer sides, making it look like the number 8. Both sides have the s...
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Suction And Discharge Pump Housing Drain
392 wordsToday most of our electric power is produced by Nuclear Power Plants. Nuclear reactors must be constantly cooled in order to maintain a level of safety. There are two types of pumps used for cooling the reactor, the centrifugal pump, and the circulating pump. The cooling water pump is a critical part in a nuclear plant and must be rebuilt continuously to avoid a reactor melt down. Here are some simple instructions that, if followed, will make your rebuild job safe, reliable and quick. First, loc...
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Margaret Thatcher Internal Affairs
1,286 wordsFor a country as powerful as the United States, there comes a responsibility to protect its allies, neighbors, and supremely itself. However, there are times when this sense of responsibility misleads the U. S. into using force that is excessive or unnecessary. We are walking a fine line of political laissez-faire and obligation to intervene, but add the element of a. Lyndon Johnson s obsessive fear of the spread of Castro-style communism x (Musicant 363), and consequently, we will find ourselve...
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Joe Dimaggio Baseball Players
674 wordsWhere have you gone, Joe DiMaggio? Our nation turns its lonely eyes to you. Whats that you say, Mrs. Robinson? Joltin Joe has left and gone away. (Mrs. Robinson, Simon and Garfunkel). On March 8, 1999 with the passing of Joe DiMaggio America may have lost one of the great baseball players and American symbols of our time. Baseball has produced many icons, but it has only produced one Joe DiMaggio. I would like to take the great DiMaggio fishing. They say his father was a fisherman. Maybe he was ...
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Polar Bear Northern Hemisphere
1,018 wordsThere are eight different species of bears found throughout the world: the spectacled bear, the Asiatic black bear, the brown bear (including grizzlies), the polar bear, the sun bear, the American black bear, the sloth bear and the giant panda. Even though most people can distinguish a polar bear from a brown bear by the color of the fur, a lot of people fail to identify all the differences among those two species. Both bears can be perceived as large, clumsy and lumbering beasts with heavily bu...
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Hand To Hand Combat Medieval Warfare
1,966 wordsThe traditions established in the military of the middle ages has had a lasting impact and still influences modern warfare today. It is also the basis for some modern day customs and courtesies. Many modern day weapons were influenced by medieval thoughts and ideas. The idea of striking the enemy before meeting on the battlefield began at this time period. Changing weapons also meant changing tactics. The invention of the longbow eventually led to demise of knights (cavalry). Nowadays, many peop...
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Conduct Electricity Special Purpose
1,254 wordsScience has come a long way in the development of new materials and products. 30 years ago, the world had been deprived of new and fantastic materials that have shaped lifestyles. These new products have an extreme diverse range of new developments. This ranges from what we carry our groceries home in and what we store our vegetables in. The efficiency of our cars and the new ways in which we communicate. All of these new developments are courtesy of new breakthroughs in the developments of new ...
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Daughter In Law Johns Mother
1,234 wordsOn the Island Section B: Essay As we approach the 21 st century our lives are changing dramatically. With the aid of computers and robots much of what used to be tedious labour is done automatically. Our modern society now allows us to dedicate more of our time to our families and our friends. Unfortunately many people do not realize the benefits of a closely connected family. Once they have grown up, the love for their parents diminishes slowly until the relationship becomes nothing more than a...
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Beats Per Minute Polar Bears
1,024 wordsPolar Bears can be found in all of the northern regions of the world. This includes Russia, Norway, Greenland, the United States and Canada. They inhabit Arctic Sea ice, water, islands, and continental coastlines. Polar bears prefer sea ice habitat with leads, next to continental coastlines or islands. Air temperatures in the Arctic average - 34 C in winter and 0 C in summer. The coldest area in winter is northeastern Siberia, where the temperature has been recorded as low as - 69 C. The ocean t...
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Polar Bear North Pole
875 wordsSaving Polar Bears Polar Bears Saving the White Beast The Polar Bear males can measure up to nine feet long, and can weigh 770 - 1430 lbs. The fur of the Polar Bear covers their entire body except their nose and pads of their feet. The Polar Bear (Ursus maritime) is the largest living carnivore on the planet earth. (National Parks Service). The polar bear lives in a small place on the top of the globe called the Arctic Circle. At an average the polar bears have about five million square miles of...
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Los Angles Police Brutality
861 wordsPolice Brutality By Matt Howard Composition Period 1 Mrs. Kolar December 20, 1996 We were following are training as L. A. P. D. officers, said officer Stacey Koon who was one of four officers accused of using excessive force against Rodney King. {Brutality in Los Angles 7 } Koon along with fellow officers Timothy Wind, Lawrence Powell, and Theodore Brine's chased King through downtown Los Angles. King had allegedly committed numerous traffic violations and was thought to be high on PCP. After a ...
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Killer Whales De Waal Science
511 wordsScientific culture For humans, it is skateboarding; for chimpanzees, nut-cracking; and for killer whales, the beach-hunting of seals. In each case, an individual acquires a particular skill by watching, and learning, from peers. And as zoologist Frans de Waal explains in The Ape and the Sushi Master (Allen Lane, pp 433), such assimilation varies according to locality. In some forests, chimps scoop up termites (its a sort of simian Pot Noodle) using leaves. Elsewhere they employ sticks. In some r...
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Development Of Nuclear University Of California
1,850 wordsShould Resisting The Introduction Of A New Should Resisting The Introduction Of A New Technology Be Seen As Anti-Progressive Should a group resisting the introduction of a specific technology be seen as anti-progress? Why? Support your argument with one or more examples of disputes about technological developments. Technology has been defined as the application of science to production, by Webster s Third New International Dictionary, this definition for the sake of this argument is too narrow. ...
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