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May 29, 2015

Homework Help: Physics HELP PLEASE

Posted by Will on Tuesday, September 18, 2007 at 9:24pm.

two spherical objects are separated by a distance of 9x10^-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object experiences an electrostatic force that has a magnitude of 4.55 x 10^-21 N. How many electrons did it take to produce the charge on one of the objects?

the answer is 40 electrons but i have no idea how to do it

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