Hey guys, I have a question regarding fields. I hope you guys can guide me to the right answer! The question states: A charge Q = 42 nC is uniformly distributed over a half spherical shell of radius R = 48 cm. What is the potential at the center? I didn't learn Gauss's Law in class but I have kind of a working knowledge of what could be done? SO i considered the equations: V=kq/r^2 and V=kq/r I'm not sure which one to use, however I did use both equations. Both equations have me the wrong answer. But then I realized in order to use those equations the charge distribution has to be uniform all over the sphere, but this is only half a sphere, so these equations probably won't work-- unless I tweak them some how? Please help?