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Use Of A Cell Phone
341 wordsThe English dictionary describes cheating as: to practice fraud or trickery; to influence or lead by deceit; get something by dishonesty. There are many forms of cheating used today in school. Some examples known today include copying a fellow student's homework, copying someone's answers off someone's test, writing test questions down for another student. One of the wildest and bizarre forms of cheating known right now involves the use of a cell phone to pass answers during a final exam. In thi...
Use Of Lead In Paints
2,035 wordsLead, symbol Pb, dense, bluish-gray metallic element that was one of the first known metals. The atomic number of lead is 82; the element is in group 14 (or IVa) of the periodic table. Lead was mentioned in the Old Testament. It was used by the Romans for making water pipes, soldered with an alloy of lead and tin. Few metals have been used in more different ways than lead. Lead ornaments and coins have been in use since ancient times. In the Middle Ages strips of lead called cases were first use...
Lead Compounds Octane Improvers
864 wordsGASOLINE TOXIC COMPOUNDS AND ADVERSE EFFECTS ON THE ENVIRONMENT In the early 20th Century gasoline was being produced by oil companies using distillates from petroleum. Unfortunately, this was not enough energy to power the new automobiles that would soon be arriving. More chemicals, additives and research had to be done. Around 1910 laws were passed that prohibited gasoline from being stored. Perhaps the car industries were growing so rapidly, it was then the government began to take note to re...
Lead's Extensive Use In Ancient Water Pipes
866 wordsLead is a lustrous, silvery metal that tarnishes in the presence of air and becomes a dull bluish gray. Soft and flexible, it has a low melting point (327 ^0 C). Its chemical symbol, Pb, is from plumbum, the Latin word for waterworks, because of lead's extensive use in ancient water pipes. Its atomic number is 82; its atomic weight is 207.19. Lead and lead compounds can be highly toxic when eaten or inhaled. Although lead is absorbed very slowly into the body, its rate of excretion is even slowe...
Use Of Lead In Gasoline
805 wordsLead and The Environment Some materials are so commonplace that we take them for granted. One of those materials is a grayish metal that has been with us for thousands of years. That metal is lead, still one of the world's most useful substances, and one that never ceases to find a role in human society. Lead has the atomic symbol of Pb (for plumbum, lead in Latin). The atomic number for lead 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 he...
712 wordsLead Poisoning One out of every six children under the age of six are suffering from health disorders due to the poisonous metal, lead. Lead is a natural occurring bluish-gray metal found in the earth's crust. It has no taste or smell. Lead can easily be found in all parts of our environment today. Most of it comes from mining, manufacturing, and the burning of fossil fuels. In the United States lead poison has increased because of the lack of knowledge in our society. Lead is released into the ...
Use Of Cars
411 words1: The area of most concern for myself is global warming because it is contributed to everyday with the use of such things as electricity and cars. Global warming could lead to seas risings and a sudden change in climate. 2: When man burns coal to produces energy it burns tonnes of coal that leads to carbon dioxide being let off into the atmosphere. Global warming could affect the whole world because natural disasters will become stronger and more frequent, the polar caps will start to melt and ...
Amount Of Lead In Your Water
1,235 wordsThe Greeks were the first to mine lead ore in their search for silver which they used for coins. They also discovered a use for lead in making wine; and as a result, they unwittingly exposed humans to a toxic metal. The Romans followed suit by using lead in many infrastructures, in wine-making, and for food storage. Their use of lead causes speculation that lead poisoning may have contributed to the fall of the Roman Empire. Major contamination of lead was brought on by the increased use of the ...
Lead Acid Storage Cell
827 wordsBATTERY RESEARCH PAPER There are many kinds of batteries which consist of different materials in order to produce an electric charge. Here are some of the most common batteries, what they consist of and how they work. Bichromate Cell (see picture # 1) A battery is a device which converts chemical energy into electrical energy. A battery usually consists of two or more cells connected in series or parallel, you can also have a single cell battery. All cells consist of a positive electrode, and a ...
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