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A neutral conductor contains a hollow cavity in which there is a +75.0 nC point charge....

A neutral conductor contains a hollow cavity in which there is a +75.0 nC point charge. A charged rod then transfers -50.0 nC to the conductor. Part A: Afterward, what is the charge on the inner wall of the cavity? Express your answer with the appropriate units. Part B: What is the charge on the exterior surface of the conductor? Express your answer with the appropriate units.

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