A Copper Penny Has a Mass of 3

question 82

Multiple Choice

A copper penny has a mass of 3.0 g. A total of 4.0 × 10¹² electrons are transferred from one neutral penny to another. If the electrostatic force of attraction between the pennies is equal to the weight of a penny, what is the separation between them?

• A)31 cm
• B)33 cm
• C)35 cm
• D)37 cm
• E)39 cm

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