1. Three charges are placed at the corners of a rectangle (one charge of -3.3e-6 C is placed on the bottom left hand corner, one charge of 2.7e-6 C on the upper right hand corner, and one charge of -6.6e-6 C on the upper left hand corner.) of length x = 0.65 m and height y = 0.43 m. How much work must be done to move the three charges infinitely far from one another? 2. U = (k*q*qo)/r 3. I tried using the superposition of the electric potential energy, but this did not yield the right answer. I don't know how to find the energy to push the charges to infinity!