Two ping pong balls (m = 25.0 g) are attached to non-conducting threads and suspended from the same poies, on the ceiling. The threads are 1.5 m long. One of the balls is charged by friction and galns an excess of electors. The two ping pong balls come into contact with each other and then are left to hang in equilibrium. If the ange between the two ping pong balls is 32 degrees, find the number of excess electrons on each bail.