We know that the negative charge on the electron and the

Chapter , Problem 57

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We know that the negative charge on the electron and the positive charge on the proton are equal. Suppose, however, that these magnitudes differ from each other by 0.00010%. With what force would two copper coins, placed 1.0 m apart, repel each other? Assume that each coin contains 3 $ 1022 copper atoms. (Hint: A neutral copper atom contains 29 protons and 29 electrons.) What do you conclude?

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