.... and the law then implies that the total momentum of the balls just before they collide is the total momentum just after the collision. Therefore if the masses of two colliding objects are known, the velocity and the velocity of the other before the collision, you can calculate the final velocity of this second object after it has collided. To obtain an exact answer however, we must find out what type of collision takes place, whether it is elastic or not elastic. The type of collision is characterized by what is called the coefficient of restitution. This quantity is approximately constant for a collision between .....

.... Diamond , which would be 100% carbon, is colorless were created million years ago, when the earth was formed, the material experienced pressure of 5million times the atmosphere at sea level and temperatures between 1000~1200degreesC. These conditions caused carbon in the layers inside the planet to crystallize into . The moved up to the earth’s surface through volcano eruptions. This is why many Diamond mines are near volcanoes. occur in two types of rock: Kimberlite and Lamprolite. are mostly found in South Africa, India, Brazil, Russia, Australia, and Arkansas. Right now about 100million carats are mined each year. Toda .....

.... Mexico. In the final stages of World War II, the U.S. dropped atomic bombs on Hiroshima and on Nagasaki three days later to force Japan to surrender. The explosion produces great amounts of heat, a shock wave, and intense neutron and gamma radiation. The region of the explosion becomes radioactively contaminated, and wind-borne radioactive products may be deposited elsewhere. The hydrogen bombs an explosive weapon of enormous destructive powercaused by the fusion of the nuclei of various hydrogen isotopes in the form of helium nuclei. A hydrogen bomb is also known as a thermonuclear bomb. The structure of the bomb is .....

.... for those who's hearts have problems with pumping blood. Pens that write upside-down are used in space, where there is no gravity and writing with pens would otherwise be impossible. They are convenient tools on Earth when we are trying to write on vertical surfaces. A zero-gravity training system is used to help astronauts become more comfortable with the conditions in space. It is used in places such as Sportsland, for kids to twirl around in. In the future, telephones with picture screens, much like those used to see astronauts in space with, will become common on Earth. Rooms with no gravity may become a part of amu .....

.... show geneticists which genes are responsible for certain inherited diseases. Identified genes could be repaired, resulting in the irradiation of inherited diseases, such as cancer. Just last year, the locations of genes for several diseases were confirmed and may soon be correctable. Secondly, research in genetics has brought about a new medical field, genetic counseling. Couples planning to have children can visit a genetic counselor and identify what medical difficulties their child may have. With continued research in genetics, couples will have the opportunity to become aware of a greater number of medical conditions .....

.... with more strength and flexibility by combing two chemically different and producing a block copolymer. Combinations of block co and composites and intended for use in booster rockets and in materials of Earth-orbiting installations. Most common are usually solid, but a new class of is being introduced in a liquid crystal state. Although these still have the physical characteristics of liquid, they are structured more like solids. Many liquid crystals are transparent at one temperature and colored at another temperature. This makes them suitable for use in liquid crystal displays, such as in digital watches, hand-held cal .....

.... compounded with other metals and elements to from alloys for common uses. In Society Aluminum Alloys are used in many ways because of it's light weight and versatility. As more and more ways are discovered to strengthened Aluminum with other elements more uses have also been discovered Aluminum is used in aircrafts, Electrical Engineering, Windows, doors, buildings, packaging and many other things. When aluminum is compounded with other it gets stronger for multiple uses. It is usually is compounded with copper, magnesium silicon, zinc, oxygen, and potassium. the strength of the alloy depends on the element it is compounded with .....

.... (Ehrlich, 1990) The problem is that everyone cares too much about societies image of them that they don’t think about the results of their actions. We also have a problem with the consumption of our resources. Many of the resources that we rely like fossil fuels, forests, and water are non-renewable. We are rapidly depleting these and have nothing to use when they are gone. Our society will have a lot of trouble turning around their habits until we are desperately low on them and it will be too late. It will be difficult to develop alternative technologies because of a lack of government funding, and the pe .....

.... detect whether or not that embryo contained the genetic disease. If this cloned embryo containd a disease then one of the other embryos could be used for implantation in a parent, this guarantees that the child would be free of genetic disease (Marshall 1025). For those who disagree with cloning I am sure if there child could be saved from a genetic disease they would reconsider cloning. Imagine if one of your friends or family members was in need of a liver or kidney. Most likely you would donate your own liver or kidney to save there life. But then you are one organ short. Well this happens a lot and seems to work fine. But if .....

.... fire as a disturbing force is itself influenced by the biota, particularly the plant community. Alteration of the vegetation by any number of factors can influence the nature of a subsequent fire. Fire has similarities to grazing as a force on vegetation because of such feedback effects (Whelan, 1995, 20). Fire History When cavemen learned to make and use fire, they could start to live in civilized ways. With fire, they were able to cook their food so that it was easier to eat and tasted better. By the light of torches, men could more easily find their way at night. They could also improve their wooden tools by hardening the poi .....