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2. (a) For a coin to leave with a charge of +2.0x10- C, how many electrons would be removed? (b) What is the corresponding fraction

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2. (a) For a coin to leave with a charge of +2.0x10- C, how many electrons would be removed? (b) What is the corresponding fraction of electron this coin has? (Assume that the coin has a mass of 4.11 g and made up of pure copper). 3. Calculate the magnitude of the force between a point charge +2.60 x 10-7 C is 9.0 cm far from a second point charge of -2.0 x 10-7 C

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