Two identical point charges (q = +7.20 × 10-6 C) are fixed at diagonally opposite corners of a square with sides of length 0.480 m. A test charge (q0 = -2.40 × 10-8 C), with a mass of 6.60 × 10-8 kg, is released from rest at one of the empty corners of the square. Determine the speed of the test charge when it reaches the center of the square. |

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