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Search results 25271 - 25280 of 30573 matching essays
- 25271: Magnesium, Beryllium, and Calcium
- Magnesium, Beryllium, and Calcium The lightest metal of all the elements is magnesium. It is the most abundant element in the Earth’s crust. Since it is so abundant, the aerospace industry uses it extensively. Magnesium is not a strong element by itself. Alloys have been developed to improve magnesium’s hardness, resistance against corrosion, and its ability to be welded. These alloys are used in making parts for aircrafts, spacecrafts, rockets, car equipment, portable tools, and household appliances. Magnesium powder burns very well. Magnesium is ... been many uses for calcium over the years, but calcium has not been available on a large scale until the twentieth century. Calcium is a metallic element, which is fifth in abundance in the Earth’s crust. It is essential for forming leaves, bones, shells, and Portland Cement. Calcium occurs in many highly useful compounds such as marble, limestone, and chalk. Plants and animals must have calcium to live. A ...
- 25272: China 2
- ... a non-Western revolution is more than a clich . That revolution has been primarily directed, not like the French Revolution but against alien Western influences that approached the level of domination and drastically altered China's traditional relationship with the world. Hence the Chinese Communist attitude toward China's traditional past is selectively critical, but by no means totally hostile. The Chinese Communist revolution, and the foreign policy of the regime to which it has given rise, have several roots, each of which is ... expanding West brought to bear on it. The general sense of national weakness and humiliation was rendered still keener by a unique phenomenon, the modernization of Japan and its rise to great power status. Japan's success threw China's failure into sharp.
- 25273: Chemistry
- ... centuries scientists had been explaining the unknown with the simple explanation that God made it that way. Though Boyle did not argue with this, he did believe that there was a scientific explanation for God’s doings. Boyle’s point of view can be seen by his dealings with the elements. At this time it was thought that an element was not only the simplest body to which something could be broken down, but ... knowing that it was not actually Boyle who discovered his law, but Towneley and Power who did in 1662 and then Hooke who confirmed it soon thereafter, it can be said that this was Boyle’s greatest achievement. His achievement being the conversion of scientific thought from one in which the spirits and the heavens were kept in mind at all times, to one based on experimentation and the use ...
- 25274: Middle Class Blacks' Burden
- ... society and all some people still see is their skin color. Malcolm X once said, "If you're born in America with a black skin, you' re born in a prison." From reading Lenita McClain's "The Middle Class Black's Burden" and Shelby Steele's "On Being Black and Middle Class" the reader concludes that middle class blacks are judged unfairly by whites and other blacks through an examination of: 1)white people thinking blacks cannot do an adequate ...
- 25275: Glass
- ... with magnesium carbonate or aluminum oxide. Nearly all silica traces of iron compound form green glass, which is one of the cheapest known. By adding traces of oxides this green colour can be neutralized. CaCo3(s) —> CaC(s) + CO2(g) Limestone Quick lime Na2CO3(s)—>Na2O + CO2 The final glass can be given a variety of bright colours. For example, the use of copper selenide or cadmium selenide produces a ruby red; copper or gold dissolved in the glass ...
- 25276: Religion & Evolution
- ... for their lives with pleasures and fantasies of an unfathomable scale than to question the existence of a supposed omnipotent being. Yet, there are a few of us humans who tend to question the why’s and wherefore’s that society puts forth to us. We question the existence of God, or the creation of mankind rather than blindly accepting faith-filled beliefs we may received from our parents as children. Perhaps it is ... of separation between church and state, and the fact that the school is very much a part of state. Yet it seems to me that if the idea is a basic building block in today’s society then why not teach this to the young? Why is it that we only teach evolution if it is so unbelievable? The simple fact of the matter is that we have evidence and ...
- 25277: Cloning, Right or Wrong
- Cloning, Right or Wrong Cloning is the process of using one organism’s DNA to create another organism exactly the same. This process is very controversial and I will be writing about some of the views that people have on this subject. Cloning, like everything, has pros and ... to provide better livestock. Also, cloning could be use to increase numbers of animals on the endangered species list. Biological proteins would be able to be produced to cure people with diseases like diabetes, Parkinson’s and Cystic Fibrosis. Pigs could be cloned to produce organs that would not be rejected by humans. Cloning could give couples who would like children, but could not have any, a chance to have them ... Thomas J. King in Philadelphia. They had transferred the nuclei of Leopard Frogs’ eggs. The egg cells did not develop. However Dr. John Gurdon accomplished successful nuclear transfer of embryo cells later in the 1970’s. The frogs did not develop beyond tadpoles however. In 1981, investigators announced they had transplanted mouse nuclei of embryos into mouse eggs. However, other scientists tried to duplicate the experiments, but found that these ...
- 25278: The Importance of Insects
- ... positive use to us than others may be, as many have functions which translate straight into money while others require millions of dollars worth of insecticides, but even the insects which do not benefit man's most simple interests fit into the Earth's crucial ecology. One of the insects' most crucial roles in our lives is as a pollinator. A great number of plants and orchard fruits are dependent almost solely upon bees, butterflies, moths, flies, beetles and ... sole association is with a single plant. The yucca moth and the yucca depend on each other, as do the fig wasp and the fig tree, as you can tell by the names. The bee's commercial products are extensive, as are the profits. The art of husbanding bees is as old as the temples of Egypt, because that's when and where it started. Bees create honey, and beeswax. ...
- 25279: Wilderness Required
- ... due to limited exploration. An archaeologist cannot easily search for prehistoric artifacts in an industrialized city. A research scientist cannot discover a cure for the AIDS virus without the rare vegetation of the rainforests. Today’s technology can produce any concoction imaginable; though most are developed by duplicating and improving what nature has to offer. As long as there are natural discoveries yet to be made, then there are cures only ... all animals, the sparks of their soul come out and clings to you, and then they are purified and become a holy fire in you.” In the wilderness, nature takes over every part of one’s being. Human superiority ceases to exist. Every detail catches the eye as the sense of fascination is fed with each passing moment. These observations feed the mind with new knowledge; knowledge of a more complex ... and sharp-grained bobcat tracks.” Whether it be for the sake of discovering vital cures, rewriting history through new findings, or preserving what is left of the natural world, wilderness is essential to the earth’s future. Human’s cannot thrive in a world without nature; medicine would run out, disease would spread uncontrollably, and natural resources would become nonexistent. Do we need wilderness? Only if one expects a future ...
- 25280: Creationism vs. Evolution
- ... for their lives with pleasures and fantasies of an unfathomable scale than to question the existence of a supposed omnipotent being. Yet, there are a few of us humans who tend to question the why's and wherefore's that society puts forth to us. We question the existence of God, or the creation of mankind rather than blindly accepting faith-filled beliefs we may received from our parents as children. Perhaps it is ... of separation between church and state, and the fact that the school is very much a part of state. Yet it seems to me that if the idea is a basic building block in today's society then why not teach this to the young? Why is it that we only teach evolution if it is so unbelievable? The simple fact of the matter is that we have evidence and ...
Search results 25271 - 25280 of 30573 matching essays
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