Recent content by edwiddy

Homework Statement My professor mentioned something called "areal radius" briefly in class, but it's I'm unclear as to what it means. It doesn't appear in the index of any textbook I have, and google is pretty unhelpful since it parses it as "area" or "a real" and returns lots of results like...

Hi, I'm a physics undergrad working through Carroll at the moment. In the section on the Kerr black hole, he states that K= \partial_t is a Killing vector because the coefficients of the metric are independent of t. He then states in eq. 6.83 that K^\mu is normalized by: K^\mu K_\mu = -...

Gotcha gotcha, seems so obvious in hindsight, thanks.

This is for a stat mech class which randomly has a homework question with an electric field calculation. It's been a while, so I've forgotten a lot :( Homework Statement We have a wire of radius r_0 that is coincident with the axis of a cylinder with radius R and length L. The wire is...