Question: Your given two concentric spherical metal shells, the smaller shell has a radius of 0.20 m and a surface charge of 9.3x10-8 C and the larger shell has a radius of 0.7 m and a surface charge of -6.5x10-8 on it.
A- Find the electric field at a point 0.39 m from the center of the spheres.
I don't just need an answer, work and explanations/walkthrough would be much appreciated! Thank you.