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Blooper
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Homework Statement
Three charges q1 q2 and q3 are set along the x-axis. q1 is at the origin and q2 is at r = 11.3mi
If q1 = +2.0C, q2 = +1.5C, and q3 = -2.3C, where must q3 be placed so that the net force on it is zero? In other words, the position of q3 is r3 = di, and you must find d. Answer in meters.
Homework Equations
F = k(q1*q2)/r^2
The Attempt at a Solution
I believe if I was given the force between the two, this question would be easy, but since no force is given, I'm not sure how to rearrange Coulomb's Law to isolate r (distance).