Suppose the force between the earth and the moon were electric rather than gravitational, with the earth
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Suppose the force between the earth and the moon were electric rather than gravitational, with the earth having a charge of +Q and the moon a charge of −Q. What is the value of Q? (The mass of the earth is 6.0 × 1024 kg and that of the moon is 7.3 × 1022 kg.)
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