Recent content by mysubs

Hello, I want to convert from cylindrical (r,a,z) --to--> cartesian (x,y,z). However, I'm a not very confident about my level at this. Say, I have dm/dr, a derivative in polar, and I want to find the equivalent expression in cartesian. (d: is partial derivative here). I thought about...

Yes, that one. I thought it might have something to do with this but couldn't think of any connection mathematically. Now it all works out, and I feel like a complete human being again. Thanks for the help!

Hi snapback, I've already came across this link during my search, but the equation in mind was with "e". I encountered the equation in Holst book of poissn-bltzman eq., I can't see it as a mistake as he built upon it later. Thanks for the reply

Hello everybody I've been searching this today but I am a bit lost now. I've encountered two forms of Gauss law in its differential form, Poisson equation : del2V(r) = -p(r)/e del2V(r) = -4*pi*p(r)/e where V:e.potential, p:charge density, e:permivity Now, what's the difference...