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Search results 81 - 90 of 278 matching essays
- 81: Effects Of The Atomic Bomb
- ... atomic bomb's thermal radiation, and the atomic bomb's nuclear radiation. An atomic bomb is any weapon that gets its destructive power from an atom. This power comes when the matter inside of the atoms is transformed into energy. The process by which this is done is known as fission. The only two atoms suitable for fissioning are the uranium isotope U-235 and the plutonium isotope Pu-239 (Outlaw Labs). Fission occurs when a neutron, a subatomic particle with no electrical charge, strikes the nucleus of one of these isotopes and causes it to split apart. When the nucleus is split, a large amount of energy is produced, and more free neutrons are also released. These neutrons then in turn strike other atoms, which causes more energy to be released. If this process is repeated, a self-sustaining chain reaction will occur, and it is this chain reaction that causes the atomic bomb to have its destructive ...
- 82: John Dalton (1766 - 1844)
- ... good amount of his experiments were later proven to not be true. But his most famous theory "Dalton law" the modern atomic theory was proved true. John Dalton also published a lot of papers on atoms. His most famous article was on "absorption of gases by water and other liquids," this article contained his atomic theory. Dalton was the first person to develop a scientific atom theory, the ancient Greeks had ... for the discovery of 90 natural elements. Dalton also explained the variations of water vapor in the atmosphere, the base of meteorology. Daltons atomic theory says that each element contained its own number of atoms. Each element had its own size and weight. Daltons idea said that all things are made of small bits of matter this bits of matter where too small to be seen even with a ... erected in his memory out side of his home in Manchester, but most other of Daltons collected relics were lost in World War II. John Dalton was a very important figure in study of atoms and meteorology. Works Cited "My Brother John". (online) available http://encarta.msn.com/encarta/MediaMax.asp?z=2&br=0&pg=3&ti=02DFD000&med=1&idx=40584 "Dalton, John". Encyclopedia Britannica, volume 7 : ...
- 83: Oxygen
- ... of all living tissues; almost all plants and animals, including all humans, require oxygen, in the free or combined state, to maintain life.3 Three structural forms of oxygen are known: ordinary oxygen, containing two atoms per molecule, formula O2; ozone, containing three atoms per molecule, formula O3; and a pale blue, nonmagnetic form, O4, containing four atoms per molecule, which readily breaks down into ordinary oxygen. Three stable isotopes of oxygen are known; oxygen-16 (atomic mass 16) is the most abundant. It comprises 99.76 percent of ordinary oxygen and ...
- 84: The Atom
- ... boiling off the negative cathode and attracted to the positive anode. These particles could be deflected by an electric field and bent into curved paths by a magnetic field. They were much lighter than hydrogen atoms and were identical "what ever the gas through which the discharge passes" if gas was introduced into the tube. Since they were lighter than the lightest known kind of matter and identical regardless of the ... between experiment and theory, and I do not think that there can ever have been a numerical agreement more impressive than this one, as I can testify who remember its advent." "On the constitution of atoms and molecules" was seminally important to physics. Bexzides proposing a useful model for the atom, it demonstrated that events ensts that take place on the atomic scale are quantized: that just as matter exits as atoms and particle s in a state of essential graininess, so also does process. Process is discontinuous and the "granule" of mechanistic physics was therefore imprecise; though a good approximation that worked for large-scale ...
- 85: Historical Development of Atomic Structure
- ... IBS Chemistry Ms. Redman The idea behind the "atom" goes back to the Ancient Greek society, where scientists believed that all matter was made of smaller, more fundamental particles called elements. They called these particles atoms, meaning "not divisible." Then came the chemists and physicists of the 16th and 17th centuries who discovered various formulae of various salts and water, hence discovering the idea of a molecule. Then, in 1766 was ... and has a positive charge. Rutherford also went down in history as the first man to artificially cause a nuclear reaction when, in 1919, he bombarded nitrogen gas with radioactive alpha particles, which resulted in atoms of an oxygen isotope and protons. A unit of radioactivity, the rutherford, was named in his honor. A colleague of Rutherford's at Cambridge University was a man named James Chadwick discovered the third fundamental ... of nuclear fission and the atom bomb The neutron has a relative atomic mass of one, and has no positive or negative charge (i.e. it is neutral). It is found in the nucleus of atoms, along with the proton.Chadwick was one of the first British scientists to stress the development of a possible atom bomb. His name was strongly associated with the British atomic bomb effort, especially during ...
- 86: Aspirin
- ... page, the Kolbe Synthesis is shown. It shows how salicylic acid is produced. The middle diagram shows the process that turns salicylic acid into acetylsalicylic acid. In the 3-D model of aspirin, the gray atoms are carbon, the white atoms are hydrogen, and the red atoms are oxygen.
- 87: Atom Book
- Atom Book Hey kids! Today I'm going to introduce you to the world of atoms. Atoms are little things that you or anybody else have ever seen. Make up things like trees, cars, paper, even you. So let's shrink down to size and see what it's like. We're ... has fewer or more neutrons than protons. So there isn't the same number of protons as neutrons. Well now that I'm big again I hope you learned everything you wanted to know about atoms.
- 88: Nuclear / Particle Physics Effects of the Atomic Bombs on Hiroshima and Nagasaki
- ... atomic bomb's thermal radiation, and the atomic bomb's nuclear radiation. An atomic bomb is any weapon that gets its destructive power from an atom. This power comes when the matter inside of the atoms is transformed into energy. The process by which this is done is known as fission. The only two atoms suitable for fissioning are the uranium isotope U-235 and the plutonium isotope Pu-239 (Outlaw Labs). Fission occurs when a neutron, a subatomic particle with no electrical charge, strikes the nucleus of one of these isotopes and causes it to split apart. When the nucleus is split, a large amount of energy is produced, and more free neutrons are also released. These neutrons then in turn strike other atoms, which causes more energy to be released. If this process is repeated, a self-sustaining chain reaction will occur, and it is this chain reaction that causes the atomic bomb to have its destructive ...
- 89: The Prospect Of Cold Fusion
- ... In the past few years, there has also emerged startling experimental evidence that elements have been transformed in cold fusion experiments. Several laboratories have found helium-4, for example, and low levels of radioactive metal atoms. Isotopes of silver and rhodium have appeared from cold fusion cells where no such atoms existed before the experiments began. Cold fusion cannot be classified as a chemical reaction or a nuclear reaction even though it does have some characteristics of each. Cold fusion cannot be a chemical process because ...
- 90: Mercury Report
- ... seen filling craters. Like our Moon, Mercury has almost no atmosphere, mostly burned off millions of years ago by the planet's close proximity to the Sun. What little atmosphere exists is made up of atoms blasted off its surface by the solar wind and has less than a million- billionths the pressure of the Earth's atmosphere at sea level. It is composed chiefly of argon, neon and helium. Because of Mercury's extreme surface temperature, these atoms quickly escape into space and are constantly replenished. With no atmosphere to protect the surface, there has been no erosion from wind or water, and meteorites do not burn up due to friction as they ...
Search results 81 - 90 of 278 matching essays
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