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A - 5.00 nC point charge is on the x axis at x = 1.20 m . A second point charge Q is on the x axis at -0.600m. a) What must be the sign and magnitude of Q for the resultant electric field at the origin to be 45.0N/C in the + x direction? b)What must be the sign and magnitude of Q for the resultant electric field at the origin to be 45.0N/C in the - x direction?

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