Two identical point charges (q= +5.40 x 106 C) are fixed at opposite corners of a square whose sides have a length of 0.590 m. A test charge (40 -5.00 x 10-8 C), with a mass of 4.00 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. Number Units 90