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An 8.0 uC (micro Coulomb) charge is located at (0,0) on a coordinate system. Another charge...

An 8.0 uC (micro Coulomb) charge is located at (0,0) on a coordinate system. Another charge 13.6 uC is located at (40,0). Where would a charge -q be placed so it is in equilibrium with the two charges, i.e. where is -q placed so the sum of the electrostatic forces on it are zero? Distances are in centimeters.

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