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Two equally charged insulating balls each weigh 0.10 g and hang from a common point by identical threads 30 cm long. The balls repel each other so that the separation between their centers is 6.8 cm. What is the magnitude of the charge on each ball? Answer: 7.59×10-9 C I know this is the answer, but i don't know how they got it. Please show me a simple way. Thanks

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