The potential energy bucket to balance up that you are trying to understand is given in the friedmann equations (http://en.wikipedia.org/wiki/Friedmann_equations)

It is a way of calculating the pressure on spacetime to bring energy into being.

The last line in the article gives you the potential energy formula

Hope this translates properly I struggle with english at times.

Last edited by Orac; 05/27/11 05:07 AM.
I believe in "Evil, Bad, Ungodly fantasy science and maths", so I am undoubtedly wrong to you.