Am I missing a step here? I can seem to see how to figure out thisproblem: Two c

Question

Am I missing a step here? I can seem to see how to figure out thisproblem: Two charged spheres are 24.0 cm apart. They are moved, and the forceon each of them is found to have been quadrupled. How far apart are they now? Giancoli Physics Ch. 16, Problem #7 is an example of it. Am I missing a step here? I can seem to see how to figure out thisproblem: Two charged spheres are 24.0 cm apart. They are moved, and the forceon each of them is found to have been quadrupled. How far apart are they now? Giancoli Physics Ch. 16, Problem #7 is an example of it. Giancoli Physics Ch. 16, Problem #7 is an example of it.

Explanation / Answer

Use coulomb law. F = 1/r^2, all others are constants F = 1/0.24^2 = 4F = 1/r^2 4/0.24^2 = 1/ r^2 r^2 = 0.24^2/4 r = 0.12 which is half the start distance.

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