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posted by paul on Wednesday, May 2, 2012 at 6:16pm.

What is the force exerted on 40 micro coulombs by 20 micro coulombs? (charges are separated by 80cm)

F = k•q1•q2/r² = =9•10^9•40•10^-6•20•10^-6/0.8^2 = ...

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