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Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly
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Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.
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Include a brief description of coal and natural gas...
Mathematics, 05.04.2020 21:49
Mathematics, 05.04.2020 21:49
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Mathematics, 05.04.2020 21:50