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(II) A 12.0-cm-radius thin ring carries a uniformly distributed charge. A small 7.5-g sphere with a charge of is placed exactly at the center of the ring and given a very small push so it moves along the ring axis ( axis). How fast will the sphere be moving when it is 2.0 m from the center of the ring (ignore gravity)
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(II) A 12.0-cm-radius thin ring carries a uniformly distributed charge. A small 7.5-g sphere with a...
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