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Search results 1361 - 1370 of 1458 matching essays
- 1361: Bats
- ... beneficial. 7. Worldwide, bats are the most important natural enemies of night- flying insects! 8. A single brown bat can catch over 600 mosquitoes in just one hour! 9. Tropical bats are key elements in rain forest ecosystems which rely on them to pollinate flowers and disperse seeds for countless trees and shrubs. 10. Bat droppings in caves support whole ecosystems of unique organisms, including bacteria useful in detoxifying wastes, improving ...
- 1362: Air Polution
- ... lung cancer (Hodges 59). The second type is sulfur oxides which come from the burning of coal and industrial processes. Damage to materials, to vegetation, and to the human respiratory system are caused by the acid nature of oxides. Small quantities of sulfur oxides can increase illness and mortality (Hodges 59). The third type of pollutant is carbon monoxide. Carbon monoxide is a colorless, odorless, tasteless gas against which humans have ...
- 1363: Platinum
- ... very much when heated, and has high electrical resistance. Chemically the metal is relatively inert and resists attack by air, water, single acids, and other ordinary reagents. It dissolves slowly in aqua regia, forming chloroplatinic acid (H2PtCl6); is attacked by halogens; and combines upon ignition with sodium hydroxide, sodium nitrate, or sodium cyanide. Platinum melts at about 1772° C, boils at about 3827° C, and has a specific gravity of about ...
- 1364: El Nino
- ... Thus, leaving our worlds subsistence and commercial fishermen with out food and money. With the already descendeing food chain on our earth, the warming water also effects the atmosphere, resulting in more extreme temperatures, more rain, and more drought periods, costing more money to our already debted economy, and the world. An example (demonstrated here by alaska) brought about by the extreme temperatures was during the 1976-77 el nino, which ...
- 1365: The Greenhouse Effect
- ... increasing the temperature. Experts predict that a possible result of the greenhouse effect will be that the world's oceans will rise a possible 1 to 4 feet. Temperatures are expected to rise causing more rain in some places and less in others. Another provider to the greenhouse effect is the use of CFCs. CFCs, or chlorofluorocarbon, are used in making plastics and in aerosol spray cans, refrigerants, air conditioners, and ...
- 1366: Thallium
- ... safety precautions. Thallium deposits are occasionally found in Sweden and the Former Yugoslav Republic of Macedonia. It is also extracted from the mud produced in lead chambers that are used in the manufacturing of sulfuric acid. Thallium is also used in Thallium high-Tc superconductors. Just recently, Thallium is beginning to be used to visualize the reduced flow of blood into the heart muscle. It is injected into the veins and ...
- 1367: Nuclear Power: Cons
- ... that areas in the U.S.A have to measured with abnormally higher radiation, it must be mentioned these areas are located in relatively close proximity to a fission power plant. In addition, "wind and rain erosion wash nuclear waste into streams and rivers, poisoning the waters, killing the fish and eventually threatening humans throughout the water they drink." (Kronenwetter, 48) The passage of nuclear waste directly from the power plant ...
- 1368: Mercury
- ... color, and slightly volatile. Mercury remains a liquid over a wide temperature range. Mercury is a solid when given a pressure of 7640 atmospheres (5.8 million torrs). It dissolves in nitric or concentrated sulfuric acid but is resistant to alkalies. Mercury melts at -39C, boils at about 357C,and has a gravity of 13.5. The atomic weight of mercury is 200.59. Mercury comes in its pure form or ...
- 1369: Lead and The Environment
- ... is 82 and the atomic mass is 207.19 AMU. It melts at about 327.502 oC and boils at 1740 oC. Lead is a heavy, ductile, soft, gray solid. It is soluble in nitric acid and insoluble in water. It is found in North, Central and South America, Australia, Africa and Europe. In modern times, lead has found a wide range of uses, and world demand for lead and its ...
- 1370: The Chlorine Debate: How White Do You Want It?
- ... this one, or even drive a car. (Abelson 94) Chlorine, a member of the halogen (salt-forming) group of metallic elements, was first made by Swedish chemist Carl Wilhelm Scheele in 1774, who treated hydrochloric acid with manganese dioxide. In 1810, the English chemist Sir Humphrey Davy determined that chlorine was a chemical element and named it from the Greek word meaning greenish-yellow. One hundred and eighty-five years later ...
Search results 1361 - 1370 of 1458 matching essays
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