Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Virial Theorem

  1. Dec 13, 2009 #1
    In my astrophysics book, it says it's [tex]\bar{P}=-\frac{1}{3}\frac{E_{gr}}{V}[/tex]

    This Wikipedia article has a different equation. http://en.wikipedia.org/wiki/Virial_theorem

    Can someone explain the difference?
     
  2. jcsd
  3. Dec 13, 2009 #2

    sylas

    User Avatar
    Science Advisor

    Yes; the variables being used are different. Your formula is using pressure and volume. Wikipedia is using kinetic and potential energy, and the "virial". Should work out to be the same, I think.

    Cheers -- sylas
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook