... heroin, there is a "rush," followed by a few hours of calm, where people go to sleep, or stay in a half awake state. (During this stage, nothing seems to bother the person. Heroin is the most addictive narcotic. Of all narcotic addicts, 90-95% use heroin. In the United Stated alone, there are between 500,000- 750,000 heroin addicts. Heroin is often mixed with cheaper substances, so that the dealer can make a larger profit. Since addicts don't know about the purity of a substance, many die because of overdoses. In an overdose of heroin, the lungs stop functioning, and the person dies from lack of air. There can be other effects of heroin addiction, one is ...

... environmental problems that exist because it is hard to get of once in the environment. In the past, mercury was used to make things like paper, put in paint and thermometers, and as an agricultural pesticide. The Minamata Disease is a good example of what could happen if mercury enters into the environment. In the mid 1950's, more than 100 Japanese were poisoned by fish that contained methyl mercury. The mercury came from industrial waste that had been dumped into the bay where the fish were caught. The mercury bioaccumulated up the food chain. The cats the were eating the fish showed the symptoms first. They began to act very strange; running into walls ...

... 1/10 of a millimeter in actual space. Then 1 millimeter is 10 co-ordinate points. CADD systems were developed along with the computer. They were developed very slowly. They went from being very large, clumsy, elaborate machines which needed lots of human intervention to one program on a floppy disk. When the power of computers increased, so did the possibilities of CADD. Images on CADD systems are drawn with the aid of a keyboard, mouse, or tracking ball. One selects the starting point of a line, the ending point, and the line is drawn. A scale at the bottom of the screen tells how long the line will be. On some CADD systems, the computer itself can measur ...

... contribute most of the rest. In the air, the sulphur dioxide and nitrogen oxides can be transformed into sulphuric acid and nitric acid, and air current can send them thousands of kilometres from the source.When the acids fall to the earth in any form it will have large impact on the growth or the preservation of certain wildlife. NO DEFENCE Areas in Ontario mainly southern regions that are near the Great Lakes, such substances as limestone or other known antacids can neutralize acids entering the body of water thereby protecting it. However, large areas of Ontario that are near the Pre-Cambrian Shield, with quartzite or granite based ...

... by your hands if pressed on. Jewelers often use 18-karat gold, which is three fourths gold. The lower the karat of the gold, the more alloy is in it. An alloy is a metal mixed with another metal to make that metal stronger. This metal is used in many ways including, tooth filling because it doesn't rust away or crack, also it is used for the covering or sealing of an astronaut's helmet. Gold is also a very good conductor of electricity. As you can see, gold is an element that is not only a great gift for someone, but is very usefull if actually put to use. The main drawback to gold is that it is a very precious metal. We dont have an unlimited supply of it. ...

... lowers testosterone levels, and damages the lungs. Most of these claims, however, have been unreplicated in humans or have been contradicted by other work. This section will address each of these reported negative side-effects. Various studies have claimed that cannabis destroys brain cells. However, several other studies found no structural or neurochemical atrophy in the brain at all. Furthermore, it should be noted that Heath's work was sharply criticized for avoiding safeguards of bias and reporting "changes" that occur normally in the mammalian brain. Wu et al. found a correlation between cannabis use and low sperm counts in human males. This is misleading ...

... of eastern and southwestern Australia and Tasmania. It is long-haired and silvery gray in eastern coastal regions but short-haired and dark gray inland. The red kangaroo, which is found throughout Australia's interior grasslands, is the largest and most powerful species. A male may attain a head-body length of 1.5 m; have a tail 1 m long; stand 2 m tall; and weigh 90 kg. A gray kangaroo can clear more than 9 m (30 feet) at a bound and attain a speed of 48 kilometres per hour. The wallaroo, a smaller and stockier animal, may be dark gray to pinkish brown; it lives in rocky country throughout Australia except Victoria. These large kangaroos travel in groups (mo ...

... hydrogen are needed). He also discovered the noble, or inert gases, and their failure to react with other substances. In 1869 a Russian chemist, best known for his development of the periodic law of the properties of the chemical elements (which states that elements show a regular pattern ("periodicity") when they are arranged according to their atomic masses), published his first attempt to classify the known elements. His name was Mendeleyev, and he was a renowned teacher. Because no good textbook in chemistry was available at the time, he wrote the two-volume Principles of Chemistry (1868-1870), which later became a classic. During the writing of this book, Mend ...

... to keep up with Intel using 3DNOW but with KNI Intel will once again take a very large lead in speed. Thus I believe Intel builds better and faster processors than AMD. The first ever problems AMD had were with incompatibility problems that plagued their entire line of CPU's until the K6. These problems hurt AMD because nobody wanted a CPU that could not run 15% of the programs out. People wanted a processor that had programs optimized specifically for it, people wanted a computer with a sticker that said "Intel Inside" because they knew every program would run on it. If people wanted a cheap solution then they went with the low-cost AMD CPU and faced incompat ...

... long! Their average weight is 86-143 pounds, surprisingly light for such a powerful animal. It’s low weight, it seems, is what allows it have it’s high top speed of sixty miles per hour. It is regarded as one the fastest hunters in the world and of course, the fastest land animal in existence. I also found that it’s habitat is in the grassy plains of Africa. This is definitely a great place for it to hide based on it’s coat color. It is because of this combination of tall grass and camouflage coat which allows the cheetah to stalk and catch it’s prey. These usually consist of gazelles, wild boar, or pretty much any animal it can handle. However, th ...