Problem a charge of -289 microc is fixed at the center of a, Ask an Expert

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Problem: A charge of -2.89 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.111 m). The charges on the circle are -4.18 µC at the position due north and +4.92 µC at the position due east.

Part A: What is the magnitude of the net electrostatic force acting on the charge at the center?

If possible just a brief explanation how you got the magnitude of the net electrostatic force acting on the charge at the center?

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