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12- A point charge Q1 = +1.50×10–5 C exerts an electric force 2.56 N on an...

12- A point charge Q1 = +1.50×10–5 C exerts an electric force 2.56 N on an unknown point charge Q2 that is 1.20 m from Q1. If Q2 is moved to another position that is 4.80 m from Q1, what is the magnitude of electric force that Q2 exerts on Q1?

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