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Problem: Four charges are placed at the corners of a rectangle. If q1 = 43.0 x 10-9 C, q2 = 29.0 x 10-9 C, q3 = -42.0 x 10-9 C, q4 = -56.0 x 10-9 C and the side of the rectangle are a = 0.31 m, and b=2a/3.

A- What would be the magnitude of the electrical field in the middle of the rectangle? Answer in units of N/C.

Please show work on how to solve! Thanks.

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