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Posted by on Thursday, January 31, 2013 at 6:00pm.

Two identical balls each have a charge of -7.5x10^-6C. The balls hang from identical strings that are 8‹ from the vertical because of the repulsive force between the charged balls. The balls are separated by a distance of 10cm. What is the tension in one of the strings? What is the mass of one of the balls?

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