Three charges, q1 = 14.46 nC, q2 = -19.62 nC, and q3 = -11.19 nC, are placed on three corners of a square, as shown in the figure. Each side of the square is 69.31 cm. Compute the magnitude of the electric field, in N/C, at the fourth corner (see the solid black dot on the figure). Express your answers accurate to two decimal places. 92 93
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