I just discovered that gamedev.SE has lots of questions easily answered by physics people. gamedev.stackexchange.com/questions/tagged/physics .

Unfortunately, all the easy ones are answered :P. A few hours ago there was an easy question on bouncing off a wall with friction.. Coefficient of restitution ftw!

@Manishearth Yeah, we've occasionally sent questions from this site to gamedev when they are too computationally-oriented, and I think we've gotten one or two migrations from them too.

never heard of mathematical ecology --- i'm pretty sure that's called environmental science in usa

@Bozostein Or it might be population dynamics... I'm not exactly sure what "mathematical ecology" is, but when I hear "environmental science" I think of something much less quantitative, involving more field work.

@Szabolcs: Note that i didn't say it is trivial. Neither mathematicians nor physicistswould be well-paid for doing trivial things. The point is that they apply their methodological knoledge in an area that is not math or physics, respectively.

@Bozostein: Type the subject into books.google.com and you'll see that there are a number og bokks on it, the first published in 1977.

As someone who is just starting their phd studies in physics, i'm wondering what the value of building a physics.stackexchange account is in terms of career prospects? Has stackoverflow generated real paid coding work for high reputation users? is something similar for physics possible? (obviously there is no comparision in terms of the number 4 hire assignments in coding versus academic physics) but I'm interested in what y'all think?

@Bozostein In fact there is something called SO Careers.

For physics, well... you certainly won't amaze someone unaware of P.SE, so the impact may not be satisfying. But this is still some chance to increase your internet visibility.

You'll never know if you're missing something. But, while writing an answer, it has to be put in clear-cut English+Mathematics. You'll immediately realize it when what you're writing is making no sense. There; you just fixed a hole in your knowledge.