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problem20_51

University Physics with Modern Physics with Mastering Physics (11th Edition)

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20.51: a) The cylinder described contains a mass of air )L, πd ρ m 4 ( 2 = and so the total kinetic energy is . Lv )d π ρ K 2 2 8 ( = This mass of air will pass by the turbine in a time , v L t = and so the maximum power is . ) 8 ( 3 2 v d π ρ t K P = = Numerically, the product . m s W 5 . 0 m kg 5 . 0 8 ( 5 4 3 air = ) π ρ b) h. km
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