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Imagine we have a spherical balloon that has a radius R1 and carries a charge of Q uniformly distributed over its surface. If we pump

Imagine we have a spherical balloon that has a radius R1 and carries a charge of Q uniformly distributed over its surface. If we pump air into this balloon to increase its radius to R2, how much does the electrostatic energy changes? Where does this change in energy come from? (20 pts)

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