Nuclear / Particle Physics Effects Of The Atomic Bombs On Hiroshima And Nagasaki
.... 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 power (World Book, 1990). This chain reaction can be attained in two different ways.
The first type of atomic bomb ev .....
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Comets
.... turn to a gas. Pressure builds up underneath the crust and causes the surface to bubble up in some places. Eventually, the weak spots of the crust break open from the pressure, and the gas shoots outward; this is referred to by astronomers as a jet. Dust that had been mixed in with the gas is also pushed out, and as more jets appear, a small gas and dust shell forms around the nucleus, and this is called the coma.
The coma, also called the head, is a dense cloud of water, carbon dioxide and other gases .....
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Invertebrate Vs Vertebrate
.... times in order to grow to reach the characteristics of a typical adult hermit crab. After reaching the adult larvae stage, the hermit crabs begin looking for a shell to live in. Once they mature and find a suitable shell, they come to live on land for the rest of their lives. Hermit crabs grow on land by shedding their exoskeleton. It takes about ten days for a hermit crab's skin to harden after molting. Shedding is a necessary part of their livelihood since they will grow back missing legs during this .....
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Coconino Sandstone
.... once extended north into Montana.
During the last ten years, a number of studies on modern and ancient sand seas, or ergs, have increased greatly our understanding of eolian bedform dynamics. Additionally, we can describe trace fossils in the Coconino and relate them to the physical environments of deposition. This provides us with more comprehensive reconstruction of the erg environments.
Although the cliff-forming nature of the formation can present certain logical problems, the exceptional three- .....
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Acid Rain
.... that cause acid rain. Power stations emit large amounts of sulfur dioxide and also nitrogen oxides, while car exhaust contains large amounts of nitrogen oxides.
Once acid rain is formed, it can stay up in the clouds for a long time. These clouds can be carried off by the wind to other areas, sometimes hundreds of miles away, where they eventually fall to the Earth as acid rain or snow. This is called transboundary pollution. For awhile some people believed that by building high smoke stacks th .....
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Dangers Of Methyl Bromide
.... fatalities directly related to the use of methyl bromide for the phase out of the pesticide to be considered a worldwide emergency.
The producers and users of the substance argue that phasing out the pesticide will cause will be economically disastrous, but clearly their view does not take into account the devastating effect on the ozone layer and the health of humans by the use of this deadly fumigant, the cost to the community far out ways the cost to the users.
So what is the alternative? T .....
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The Effect Of Temperture On Air Pressure
.... that the milk jug will remain the same.
3) the experiment with the egg and the bottle is that the egg will not be sucked in the bottle.
PROCEDURE:
For the first experiment the procedure is:
1) Heat an ordinary pop can on a hot plate.
2) After about fifteen minutes take the can off the hot plate and put it upside-down in a pan of cold water.
3) Record my observations on a piece of paper.
4) Write my conclusions in my science fair logbook.
For the second experiment my procedure .....
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Homosexual Gene
.... Some traits are not politically and religiously charged: the hardness of the enamel on your teeth, which is controlled by a single gene, whose location is known, and who’s function we do understand.
Now scientists are attempting to find proof if the infamous “gay gene”. For years, the gay community has been trying to prove that they were “born gay” and that their lifestyle was not choice. The news media has a ridiculous double standard for the trait "sexual orientation" and every other trait. ABC' .....
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Supernovas
.... explosive happenings known is a supernova. Supernovas occur at the end of a stars lifetime, when its nuclear fuel is exhausted an it is no longer supported by the release of nuclear energy. If the star is particularly massive, then its core will collapse and in so doing will release a huge amount of energy. This will cause a blast waver that ejects the stars envelope into interstellar space. The result of the collapse may be, in some cases, a rapidly rotating neutron start that can be observed many year .....
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Two Inventions That Changed European History
.... field with crops and left the other half of a field was left unplanted for a year so as not to exhaust the soil. This system led to problems, because dividing the land in half led to shortages in the production of food because only half of the field was being used. This system of agriculture needed some minor adjustments to increase the production of food without destroying the soil in the process. This new system came about around the year 800. Farmers began to use a new system, the three-field system, .....
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Darwin's Theory And Modern Genetics
.... Mendel’s pea plants proved there was a way of artificially creating trends in color of flowers. This discovery led to modern genetics. We now know chromosomes carry valuable information that determines characteristics in living species.
When you put these two discoveries together you really understand how animals have evolved to their currant state. When animals are born the have traits that help them live or inhibit their ability to live. If the die they cannot mate with other anima .....
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Hydroelectricity
.... steam-power plants made it obvious that only very large and costly hydroelectric installations could compete effectively, and that the federal government would have to assume a major share in their construction. Motivated by the search for the multiple use of water resources, including navigation, flood control, and irrigation, in addition to power production, the Tennessee Valley Authority, or TVA, started government participation in large-scale waterpower development in 1933.
Most major i .....
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Saturn
.... and phosphine. Saturn has an average temperature of negative one hundred and seventy six degrees Celsius below zero. On the surface of planet winds can reach up to nine hundred mile per second. Saturn also has a jet stream. Saturn's magnetosphere consuts of a set of doughnut-shaped radiation belts in which electrons and atomic nuclei are trapped. The belts extend more than two million kilometers from the center of Saturn and even farther in the direction away from the sun, although the size of the magneto .....
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The Prairie Dog: Friend Or Foe?
.... on National Grasslands and other federal lands typically limit prairie dogs to small percentages of available potential habitat.
Prairie dogs are essential to our prairie ecosystem. Many species dependent on prairie dogs for prey and habitat are diminishing in direct relation to the decreasing number of prairie dogs. Unlike other species, which have declined because of habitat loss due to human activities, the loss of prairie dog populations is a direct result of governmental and private landow .....
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Solar Energy
.... needed to be found that would have to function over a long period of time with a continuous source of electrical power. If these needs weren’t met future space activities would be limited. Solar energy was eventually used. Once an unmanned space probe was on its way no one would be there to oil or repair it.
Solar cells today are made out of one of the earth’s most common ingredients, silicon. Silicon used in producing solar cells is very carefully prepared. The flow of electricity takes place when the c .....
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