.... the diet. Repeated acid attacks break down the tooth, which causes cavities. Fluoride also acts to repair areas in which acid attacks have already begun. The remineralization effect of fluoride is important because it reverses the early decay process as well as creating a tooth surface that is more resistant to decay. Community water fluoridation is the adjustment of the amount of the beneficial trace element fluoride found in water to provide for the proper protection of teeth. Fluoridation has been widely utilized in this country since 1945. It does not involve adding anything to the water that is not already there, since virtually all sources of drinking w .....

.... that the remaining variable V and I is known. A resistor is a piece of electric conductor which obeys Ohm's Law and has been designed to have a specific value for its resistance. As an extension of the Ohm's Law, two more relationship can be drawn for electric circuits containing resistors connected in series or/and parallel. For resistors connected in series, the sum of their resistance is, RTOTAL=R1+R2+ ..... +Rn . And for resistors connected in parallel, 1/RTOTAL==1/R1+1/R2+ ..... +1/Rn . Complex dc circuit involving a combination of parallel and series resistors can be analyzed to find the current and voltage at each point of the circuit .....

.... substance that we have for communicating fire and for producing a quick hot flame, and it is for these purposes that it is now principally used in the military art. Standard is used in petards, as a base charge or expelling charge for shrapnel shells, in saluting and blank fire charges, as the bursting charge of practice shells and bombs. Despite the fact that is called under one name, there are many different forms of . These are merely classified as how strong their reactions are, in other words, the size and power of their reactions. The most typical form of is the mixture of sulfur, charcoal, and potassium nitrate. Another form of this powder is .....

.... like our human jumping. This amazing creature was the kangaroo, often referred to as the "Boomer" or "Old Man" in Australia. The Gray Kangaroo, the most well known species average weight is 145 pounds and from nose to tip of the tail is 10 feet long. The tail alone is about 4 feet long. The kangaroo has a small head with large ears and a small mouth. The fur is soft and woolly and some can have stripes on them. The kangaroo's body is specially built for jumping. It has two long, powerful hind legs with four toes on each. The front legs are short and have five toes with claws. These paws are used to handle food. Most of it's weight it in the hind legs a .....

.... cease to exist." Without autotrophic organisms heterotrophic organisms would not be able to survive for two asic reasons. One is the fact that autotrophic organisms create most of the oxygen that heterotrophs breath. Whithout them, heterotrophs which need oxygen to survive would not live very long. The second reason is that autotrophs are the lowest food on the food chart. Without them many heterotrops would die from starvation. 3. Why did you put your syringes containing leaf material in the dark prior to illumination? The reason this was done was to make sure as little oxygen as possible was contained in the leaf material. This coused the experimrnt to ru .....

.... that led Newton to discover The Law of Universal Gravitation in 1666 (Eddington 93). As Newton later wrote, it is the story of the sight of an apple falling to the ground (he was resting at Woolsthorpe because of the plague at Cambridge) that caused Newton to wonder if this same force was what held the moon in place (Gamow 41). Newton knew that an object fell to the earth at a rate of about 9.8 meters (32 feet) per second second as pointed out by Galileo. Thus "the apple that fell from the tree" fell to Earth at about this rate. For the first basic explanation of this we will assume a linear plane, one in which all forces act in only one direction. Theref .....

.... of the pond. The way the land is shaped around a natural pond is also usually similar to the surrounding landscape. Sudden changes will look and feel forced. Simple shape pond shapes are best. Sharp curved edges or too many curves look artificial. Choose plants for the pond and its surroundings that make the pond look genuine. Plants at the water's edge are usually different from those found on the surroundings higher ground. Especially reminiscent of natural ponds are large plant's that leaves overhanging the water's edge, and plants with long thin, grassy foliage that grows in the shallows. These will all help to cover the water edge, which is almost never .....

.... in structure as the diamond lattice. Decaterpene, as in diamond, was proposed by Decker to be highly structured and strain free.2 Decker proposed decaterpene in 1924, but that was all it was until 1933 when the structure was proven to exist. Isolated in the petroleum of Hodinin, Czechoslovakia by Landa and Machachaeck, decaterpene became incarnate.3 However, the fact that they found the structure Decker predicted did not mean that his nomenclature would be used to identify the compound. That honor was bestowed upon its discoverers Landa and Machcahcaeck who used the Greek translation of diamond, , to identify the compound.2 Crude petroleum is separat .....