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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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Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.
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3. a 2,000-kilogram railroad car moving at 5 m/sec to the east collides with a 6,000-kilogram railro...
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