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Predict/Calculate The point charges in Figure 19-42 have the following values: q1 = +2.1 μC, q2 = +6.3 μC, q3 = −0.89 μC. (a) Given that the distance d in Figure 19-42 is 4.35 cm, find the direction and magnitude of the net electrostatic force exerted on the point charge q1. (b) How would your answers to part (a) change if the distance d were doubled? Explain.
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