Recent content by Ralru

Thank you very much. It's nice to know that I have not gone completely insane yet. It's been quite a while since I played with this stuff--and after a long hiatus, one begins to doubt his/her own ability. Thanks again.

Homework Statement When I try working out the example below from PlanetPhysics, I wind up with 2PI rather than 4PI in my answer. Should I be considering my result valid for only a hemisphere and double it for a sphere--or am I just making a mistake in my math? "As an example of the...