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May 23, 2015

Homework Help: Physics HELP!!

Posted by Maria on Wednesday, January 23, 2013 at 11:16am.

Two iron spheres each have a volume of 10 cm^3 and a mass of 78g. How many electrons must be placed on each sphere so that the electrostatic force of repulsion between them just balances the force of gravitational attraction? Assume the distance between the spheres is more than 2 meters.

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