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If a balloon is taken outside on a very cold day, what will occur?
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Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?
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A light wavelength is 445nm falls on a piece of metal. The maximum energy of the electron doubles wh...
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