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Consult Concept Simulation 18.1 for insight into this problem. Three charges are fixed to an x, y coordinate system. A charge of +18 mC is on the y axis at y=+3.0 m. A charge of –12 mC is at the origin. Last, a charge of +45 mC is on the x axis at x=+3.0 m. Determine the magnitude and direction of the net electrostatic force on the charge at x=+3.0 m. Specify the direction relative to the –x axis.

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