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Consider three charges q1 = 5.10 nC, q2 = 7.10 nC, and q3 = -2.60 nC, arranged in a triangle as shown below. The volume of q1 is 7.50 10-30 m3, the volume of q2 is 2.30 10-30 m3, and the volume of q3 is 3.45 10-30 m3.

(a) What is the electric force acting on the charge at the origin?

(b) What is the net electric field at the position of the charge at the origin?

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