Two identical point charges (q = +4.60 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.510 m. A test charge (q0 = -4.80 x 10-8 C), with a mass of 9.80 x 10-8 kg, is released from rest at one of the corners of the square. Determine the speed of the test charge when it reaches the center of the square.
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