Recent content by Auburnman

So I've been reading a bunch about the FRW metric and doing FRW dynamics. I had a quick theory question involving the FRW Model in general. So in the Friedmann equations why is it that if the combination of (ρ + 3p) is always positive then it somehow proves the existence of a big bang like...

...dude this is general relativity get out of here with your Forces lol, that's Newtonian physics your talking about

I am having some trouble interpreting different effective potentials The first potential is V = (L^2)/(2r^2) - (r^2)/(2R^2) - (L^2)/(R^2) The second potential is V = (-1/2) + (L^2)/(2r^2) -(L^2)/(R^2) What I am having a hard time identifying do these potentials have stable orbits...

is there some other median besides this that you would like to talk about the problems or u going to work on it alone?

does that matter?

yes, what did u get for the true false questions?

you know how 2 do 4b? because if i get that i can get the rest of problem 4

ok well i don't even know where to begin so its alittle hard to attempt a problem to prove you have tried it if u don't know where to start

Consider cylindrical coordinates p = (x^2 + y^2)^.5  angle = arctan(y=x). Consider your curve to be specified by z(p). Write down a (first order) differential equation governing z(p) please help!

Homework Statement (30 points) Consider the metric ds^2 = -(1 -(r^2/R^2))dt^2 + (1-(r^2/R^2))^-1 dr^2 + (r^2)d(omega)^2 Note that spacetime becomes at at small r, not large r. r < R. (a) Calculate the (exact) gravitational redshift (w_2)/(w_1) between two stationary ob- servers at...