Two identical small charged plastic balls are dropped into a vertical tube, one after the other. The
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Two identical small charged plastic balls are dropped into a vertical tube, one after the other. The repulsive electrostatic force acting on the topmost ball is just enough to counterbalance the gravitational force acting on it at a distance above the lower ball is the center to center distance between the balls resulting in an equilibrium state. If we were to double the charge on each ball, what would be the new separation at which the upper ball would be in equilibrium? Give your answer in
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