1. The problem statement, all variables and given/known data What is E in Magnitude and Direction at the center of the square of (fig. 3-7). Assume that q = 10x10-8 C and a = 5 cm Now I have am not well versed with vectors, I dont like them and they dont like me. I can not figure out the directions the magnitudes move in. 2. Relevant equations r=1/2(√2 a) = a/√2 E=k*q/r2 ETotal = E1 + E2 + E3 + E4 3. The attempt at a solution So far I only managed to do this: r= 5.0cm/√2 = 3.55*10-2 E-q=(8.99*109)*((-1.0*10-8 C)/(3.55*10-2 m)) = 7.13*104 N/C E2q=(8.99*109)*(2*(-1.0*10-8 C)/(3.55*10-2 m)) = 1.43*105 N/C And since the other magnitudes are the same I dont need to calculate the others. So the next step involves knowing exactly which angles you need to calculate everything together. And thats what is giving me trouble.