You rub an ebonite rod with fur so that the ebonite rod is negatively charged (t

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You rub an ebonite rod with fur so that the ebonite rod is negatively charged (thus, the fur is now positively charged). You touch the (negative) ebonite rod to a ping-pong ball wrapped in aluminum foil that is hanging from the ceiling by a thread. You touch a second aluminum-wrapped ping-pong ball with the (positive) fur. When the two ping-pong balls are brought close together Choose one answer. a. there is no force between them. b. they repel each other (they are pushed apart). c. there may be a force between them, but we cannot know without knowing more about the charges on each. d. they attract each other (they are pulled together).

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