A household battery supplies of electrical energy

PHYSICS · Subjective · A Level · Physics · Nuclear physics · Nuclear physics

Problem

A household battery supplies 1 kW h1\,\text{kW h} (=3.6×106 J)(=3.6\times10^{6}\,\text{J}) of electrical energy. If this entire energy came from direct mass–energy conversion, calculate the amount of mass that would need to be annihilated. Express your answer in micrograms.

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