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Physics, 21.06.2019 20:30
When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false
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If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.
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Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?
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What element has 34 protons and 36 electrons...
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