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J. j. thomson’s experiment disproved the theory that an atom
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Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.
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Does heating a metal wire increase or decrease its electrical resistance? why?
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2. A man falling down is changing () energy
into
energy...
into
energy...