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A neutral metal can of radius R = 3.50 cm and mass m = 2.00 g...

A neutral metal can of radius R = 3.50 cm and mass m = 2.00 g is rolling without slipping on a level surface as a positively charged rod is kept at a distance 4.00 cm from the center of the can. If the can accelerates at 0.227 cm/s2 , how many electrons are in the can?

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