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April 16, 2014

Homework Help: Physics

Posted by Alex on Saturday, January 21, 2012 at 4:10pm.

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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