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A ball of circumference 72.7 cm and mass 605 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity. (The density of water is 103 kg/m3.)
a) Calculate the buoyant force on the ball. (Indicate the direction with the sign of your answer.)
b) Calculate the drag force the ball experiences while it is moving upward at constant velocity. (Indicate the direction with the sign of your answer
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In a lightning bolt, a large amount of charge flows during a time of 1.6 x 10-3 s, How much charged has flowed during the lightning bolt
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the peak intensity of sunlight arriving at the upper atmosphere of the earth is around 1300wm2. the earth is situated
A puck (mass = 0.3 kg) slides without friction on a horizontal plane. It is attached by a light string (length = 1 m) to a ring on a peg. find the tension in the string as the puck revolves around the peg
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