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- 먼지의 영향과학동아 199304
- Administration's Air Resources Laboratory in Boulder, Colo., top soil in the United States erodes by wind at the rate of 20 million tons a year. Some of the dust is from areas not used by human ...
- 맨틀과 핵과학동아 199212
- well, 40 million years' worth) stabilization of Earth's magnetic field polarity. Super-plumes may increase the rate of movement in the liquid outer core, altering the force of the geodynamo.Ben ...
- '파이어니어'와의 안녕과학동아 199212
- as molten mantle rock rises.Dark margins encircle half of the Venusian craters, but also exist without a central crater. Geophysicist K.J. Zahnle believes that many meteorites would brea ...
- 단백질의 위력과학동아 199206
- to make an inventory of the parts involved, identify the chemical intermediates of each reaction, measure the rate constants for the transitions, and describe the detalied structure of the prot ...
- 찾기 힘든 쿼크를 찾아서과학동아 199107
- rapidly. Some neutron stars rotate so rapidly that they send out a burst every few thousandths of a second. At such a rate of turning, even a neutron star, with all its density, can hardly hold ...
- 아인슈타인은 역시 옳았다.과학동아 199106
- by Galileo four centuries ago, and since then, it has been proved by experiments that have been progressively more accurate.There is just one way in which the principle of equivalence is, as ye ...
- 거리 측정과학동아 199105
- be. In consequence, the farther out they go from earth, the more uncertain they are about distance, and about the rate of expansion and about the age of the universe.Right now, the age of the u ...
- 블랙홀이 지구에도 있는가?과학동아 199101
- a hot spot? Even a tiny miniblack hole with a mass of only about 6 billion tons would produce enough heat as it evaporated to account for a hot spot.Trofimenko also points out there are regions ...
- 금이 없다!과학동아 199011
- The national debt of the United States is on its way toward the $3 trillion mark and it won't be many years at this rate that the money our nation owes to its citizens and the rest of the worl ...
- 보이지 않았던 별과학동아 199009
- eclipses, according to some theories.Similarly, places were found in the American continents where sunlight could penetrate a crevice in such a way that only on the morning of the summer solsti ...
