Posted by **shaun** on Thursday, February 14, 2013 at 5:21pm.

Two spherical objects are separated by a distance of 1.41 × 10^-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 1.40 × 10^-20 N. How many electrons did it take to produce the charge on one of the objects?

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