In the figure particle 1 (of charge +4.14 mC), particle 2 (of charge +4.14 mC), and particle 3 (of charge Q) form an equilateral triangle of edge length a. For what value of Q (both sign and magnitude) does the net electric field produced by the particles at the center of the triangle vanish? Number Units
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The tolerrance is ± 1 in the 3rd significant digit
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