Solving Freidmann Equation: Understand Calculations & Cosmology

[AleksanderPhy]

Hello there I may have physical mistakes and stupid question so say if I have something wrong. But I want to get help on Freidmann equation.It looks like this:

So first I want to know what that What you can calculate with this equation. Second question is what's the little point on capital r. And what's the k ?

PS! Can I get some webpages where I can read about cosmology.

 

[Orodruin]

Honestly, taking an equation you do not understand out of its context and trying to understand it is not the best way to learn physics. You need to work from the ground up, not the other way around.

The dot represents a time derivative, the k is the spatial curvature of the Universe, and the Friedmann equation is used to compute how the universe expands.

 

[AleksanderPhy]

Thanks

 

[Chalnoth]

The Wikipedia article is a good place to start here:
https://en.wikipedia.org/wiki/Friedmann_equations

 

[AleksanderPhy]

Ok thanks(;