Question: 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

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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