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Three charges: Q1, Q2 and Q3, are located on a straight line. The charge Q3 =...

Three charges: Q1, Q2 and Q3, are located on a straight line. The charge Q3 = 6.75 ?C is movable along this line. The charges Q1 = -8.75 ?C and Q2 = 2.80 ?C are fixed at their positions, with Q2 at the distance d = .436 m to the right of Q1. For what position of Q3 (with respect to Q1) is the net force on Q3 - due to Q1 and Q2 - equal zero? Convention: use the plus sign for Q3 to the right of Q1.

How do you tell whether the answer is the positive value or negative value?

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