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Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain
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Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.
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A 50,000 kg train is rolling on its own down the track at 5 m/s. You grab the rope trailing behind i...
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