The figure below shows a small, hollow, rubber ball hanging vertically from a thin, lightweight thread. The ball has a mass of 6.60 g and a uniformly distributed charge of q = 28.0 nC. Directly below it is a second ball with the same mass, but a charge of q = -58.0 nC. (Assume this second ball is fixed in place.) The centers of the two rubber balls are a distance d = 2.00 cm apart. 91 + 92 (a) What is the tension (in N) in the thread? (b) The thread will break if the tension in it exceeds 0.180 N. What is the smallest possible value of d (in cm) before the thread breaks? cm