... to recent discoveries of large reserves. At present, uranium is only being mined and separated from ore. However, a huge untapped source is our oceans. Sea water contains 3.3x10^(-9) (3.3 parts per billion) of uranium, so the 1.4x10^18 tons of sea water contains 4.6x10^9 tons of uranium. All the world's electricity usage, 650GWe could therefore be supplied by the uranium in sea water for 7 million years(Energy 25). This is a only a theoretical number because it is not possible to get all of the uranium out of our vast oceans. Also, it does not include the fact that in that many years, half of the uranium will no longer exist due to radioactive decay. So, at wo ...
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... paper are compounds of carbon with hydrogen and oxygen. Proteins such as hair, meat, and silk contain these and other elements such as nitrogen, phosphorus, and sulfur. More than six and a half million compounds of the element carbon, many times more then those of any other element, are known, and more are discovered and synthesized each week. Hundreds of carbon compounds are commercially important but the element itself in the forms of diamond, graphite, charcoal, and carbon black is also used in a variety of manufactured products. Besides the wide occurrence of carbon in compounds, two forms of the element--diamond and graphite, are deposited in wi ...
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... hydrocarbons. These compounds are composed only of carbon and hydrogen. Almost all other organic compounds can be considered as derivatives of the hydrocarbons. If the carbon atoms are linked in chains, the compounds are called aliphatic compounds. If the atoms are linked in rings, the compounds are called cyclic compounds. (pg.581, ...ibid...) (Biology Pamphlet) In terms of naming organic compounds the number of carbon-carbon chains are named using the prefixes below: meth- 1 carbon eth- 2 prop- 3 but- 4 pent- 5 hex- 6 hept- 7 oct- 8 non- 9 dec- 10 ...
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... disorder . (Harvard, 1). Common are panic attacks (panic disorder), phobias, and general anxiety disorder (GAD). Panic attacks can begin with a feeling of intense terror followed by physical symptoms of anxiety. A panic attack is characterized by unpredictable attacks of severe anxiety with symptoms not related to any particular situation. (Hale, 1886). The person experiencing the attack may not be aware of the cause. Symptoms include four or more of the following: pounding heart, difficulty breathing, dizziness, chest pain, shaking, sweating, choking, nausea, depersonalization, numbness, fear of dying, flushes, fear of going crazy. Heredity, metabolic factors, ...
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... Normally, all colors of the spectrum are able to be matched by mixtures of only three color sensitivities. Therefore, the huge variety of colors we see are a response to different compositions of wavelengths of light. The rods are responsible for encoding white and black. results when one or more of the cone cells fail to function properly. One of the visual pigments may be functioning abnormally, or be absent altogether. There are several different types of , however, complete , or achromatopsia, is probably the simplest to understand. This is the rarest form of . This is when no colors can be seen at all. The color receptors are almost completely gone ...
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... since it's a way to distribute movies with extended features such as user-selectable camera angles and multiple language support. Also, like CD's, there are writeable and rewriteable variations coming. DVD is just starting to make a significant impact on the market. Estimates vary from about 600,000 to 1,000,000 console players ("living room" boxes used strictly to play movies) sold in the United States through the end of 1998. So far, the number of DVD drives in PCs is far smaller. DVD technology can handle one or two layers of data per disc side. That makes for four sub varieties of DVD-ROM, the read-only version of this technology: DVD5 (single side, ...
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... anywhere in Africa. It breeds on some twenty islands, from Hollams Bird Island off the coast of Namibia to Bird Island in Algoa Bay. At one time the population of the African Penguin was quite large but some man caused factors has drastically reduced their species. A long time ago the early European settlers at the Cape of Good Hope realized that penguin eggs were good for eating and over the years millions of penguin eggs have been collected greatly reducing the population of the African penguin species, and even to make things worse they started the practice of destroying any incubated eggs so that there would be fresh ones when these collectors paid ...
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... is much easier to read than Fahrenheit. Fahrenheit is hard for many people to understand and translate because it is not read in increments of one. Instead it is read having thirty-two degrees Fahrenheit being zero and two hundred and twelve degrees being the boiling point, While the Celsius (metric unit of measure for temperature) is read with one degrees Celsius being the freezing point of water, and one hundred degrees Celsius being the boiling point. I think that should be used everywhere in the world because it would make all measurements universal and understandable. I think that the United States of America will someday switch to the metric way of measuri ...
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... families with children form Asia, Africa, South America, Eastern and Mediterranean Europe (as these areas have a high number of people infected); drug users; and anyone in close contact with someone infected. This is not as scary as it seems, for you cannot contract the virus through sneezing, coughing, or holding hands. A surprising fact about hepatitis B, considering it is preventable, is that one in twenty people are or will be infected in their lifetime. There are one million people infected in the United States. More than 350 million people worldwide are chronic carriers of the virus. A chronic carrier is someone with the virus in their bloo ...
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... (A), guanine (G), thymine (T), and cytosine (C). The deoxyribose molecule occupies the center of the nucleotide, with the phosphate group on one side and a base on the other. The phosphate group of each nucleotide is also linked to the deoxyribose of the adjacent nucleotide in the chain. These linked deoxyribose-phosphate subunits form the side rails of the ladder. The bases face inward toward each other, forming the steps of the ladder. The nucleotides in one strand have a specific association with the corresponding nucleotides in the other strand. Because of the chemical affinity of the bases, nucleotides containing adenine are always paired with nucleoti ...
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