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A charge of -7 x 10-8 C exerts a force of 0.045 N on a charge of +6.0 x 10-7.

A charge of -7 x 10-8 C exerts a force of 0.045 N on a charge of +6.0 x 10-7.

How far apart far are the charges?

 

f=kQq/r2
Rearanged: [sqrt](kQq/r2)

=[√](9×109)(7×10-8C)(6×10-7C)/(0.…
r=.092m

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