A portable CD player uses a current of 7.5 mA at a potential difference of 3.5 V.

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A portable CD player uses a current of 7.5 mA at a potential difference of 3.5 V.
(a) How much energy does the player use in 35 s?
(b) Suppose the player has a mass of 0.65 kg. For what length of time could the player operate on the energy required to lift it through a height of 1.0 m?
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Physics

ISBN: 978-0321976444

5th edition

Authors: James S. Walker

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