Suppose that a penny has enough electrons removed from it to acquire 1.00 C of charge.
(a) What fraction of its electrons must be removed to acquire this charge?
(b) If the excess charge is deposited on a second penny and the pair is placed 1.00 km apart, what is the resulting force between them?
Take the mass of each penny to be 2.50 g, and assume each is made of pure copper.
Hint : How many electrons does each atom have? How many atoms are there?
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