1. The problem statement, all variables and given/known data Two point charges are placed at the opposite corners of a rectangle as shown. What is the Electrical Field magnitude at each point due to the charges? 2. Relevant equations Pythagorean theorem, E=kq/r^2 3. The attempt at a solution r= square root of .8^2 +.4^2 =.89 E= 8.99x10^9 X 4X10^-6 divided by (.89^2) E=8.99x10^9 X 2X 10^-6 divided by (.89^2) should I not be dividing by .89^2 but rather the radius of an electron? I am not sure if A and B should be negative or positive or if I am doing this right..?