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Search results 211 - 220 of 278 matching essays
- 211: The Dangers of Nuclear "Progress"
- ... Soviet Union and Great Britain had produced and exploded their first nuclear weapons, and nuclear technology was spreading across the world quickly. Despite efforts of the United States to prevent the spread of nuclear proliferation ("Atoms for Peace" program), countries continued to produce nuclear arms secretly. By the early 1960s, France and China joined as nations with nuclear powers. The original nuclear powers feared that more countries would follow, but nonnuclear ...
- 212: Cryogenics And The Future
- ... 195) and also flows "...through the slit disclosing no friction..."(Landau 195) That this means is that when Helium reaches this state it can flow, without any friction, through the smallest holes and in between atoms in a compund. If the top is off the beaker it is also possible for the liquid Helium to flow up the side of the baker and out of the beaker until all the liquid ...
- 213: The Search for Black Holes: Both As A Concept And An Understanding
- ... that impact, of huge amounts of energy from the two clouds. The clouds come together with a great enough force, that a nuclear reaction ensues. This type of energy is created by fusion wherein the atoms are forced together to form a new one. In turn, heat in excess of millions of degrees farenheit are produced. This activity goes on for eons until the point at which the nuclear fuel is ...
- 214: Nucular War
- ... fissile material, nuclear weapons could use the energy released in the fusion of light elements. This process is the opposite of fission, since it involves the fusing together of the nuclei of isotopes of light atoms such as hydrogen. It is for this reason that the weapons based on nuclear-fusion reactions are often called hydrogen bombs, or H-bombs. Thermonuclear Tests November 1, 1952, there was a test with a ...
- 215: Mass And Science
- ... made up of matter. Matter is anything that has mass and takes up space. Most matter on earth exists in three states: liquids, solids, and gas. All matter is made up of tiny particles called atoms. An atom is the smallest unit of matter that can exist and still be recognized. You and all the things around you are made of matter. Since we all live at the surface of the ...
- 216: CHEMICAL REACTIONS
- ... oxygen and another combustible substance, such as wood. John Dalton, in the early Nineteenth Century, discovered the atom. It gave way to the idea that a chemical reaction was actually the rearrangement of groups of atoms called molecules. Dalton also said that the appearance and disappearance of properties meant that the atomic composition gave the appearance of different properties. He also came up with idea that a molecule of one substance ...
- 217: Cannabis Sativa
- ... a fascinating technique called tagging. It makes use of a radioactive form of chemical elements, usually carbon. The radiation involved is not strong enough to be harmful. Scientists replace one of the carbon or other atoms in THC with a radioactive atom, the THC behaves exactly the same as before, but now it has a tag attached to it. By using instruments for detecting radiation, researchers can follow the tagged substance ...
- 218: Stars
- ... weight of the gases overhead. Eventually, deep in the interior the temperature and density are high enough (10,000,000 K and 30 g/cu cm) for a nuclear reaction to occur, converting four hydrogen atoms to one helium atom, with a 0.7% loss of mass. Because the conversion of this mass (m) to energy (E) follows Einstein's equation E = mcc (where c is the velocity of light), such ...
- 219: Light: A Fundamental Force In Our World
- ... light wave. Like a particle, the photon is believed to have a finite mass, and has the ability to affect other matter. As light strikes a photovoltaic solar cell, it knocks electrons in the silicon atoms on the surface into a higher state of energy. When these return to their normal, or "ground" state, energy is produced in the form of electricity. Thus, light is termed a "wave- particle," and this ...
- 220: Dna 2
- ... existence. The insulin molecule consists of two chains of linked amino acids, the A chain containing 21 amino acids, the B chain, 30. These chains are connected by two disulfide bridges (formed of two sulfur atoms each), while a third disulfide bridge stretches across several amino acids on the A chain. The connected chains are partially coiled and twisted into globular structure, a configuration essential for biological activity. Insulins most ...
Search results 211 - 220 of 278 matching essays
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