Comments on: Mass Matters http://asymptotia.com/2008/02/13/mass-matters/ Wed, 07 Jan 2009 23:55:01 +0000 http://wordpress.org/?v=2.5.1 By: Carl Brannen http://asymptotia.com/2008/02/13/mass-matters/#comment-109581 Carl Brannen Sat, 16 Feb 2008 07:09:44 +0000 http://asymptotia.com/2008/02/13/mass-matters/#comment-109581 Rather than Schwarzchild coordinates, an interesting alternative is Painleve, which are explained in the intuitive article <a href="http://arxiv.org/abs/gr-qc/0411060" rel="nofollow">The river model of black holes</a> by Hamilton & Lisle. Rather than Schwarzchild coordinates, an interesting alternative is Painleve, which are explained in the intuitive article The river model of black holes by Hamilton & Lisle.

]]> By: Blake Stacey http://asymptotia.com/2008/02/13/mass-matters/#comment-109379 Blake Stacey Thu, 14 Feb 2008 20:32:44 +0000 http://asymptotia.com/2008/02/13/mass-matters/#comment-109379 The mechanism is a little clunky, but there's a way to link to a specific revision of a Wikipedia page. Check for the "permanent link" entry on the left-hand sidebar (or see <a href="http://www.sunclipse.org/?p=388" rel="nofollow">my quick how-to page</a>). The mechanism is a little clunky, but there’s a way to link to a specific revision of a Wikipedia page. Check for the “permanent link” entry on the left-hand sidebar (or see my quick how-to page).

]]> By: EJ http://asymptotia.com/2008/02/13/mass-matters/#comment-109337 EJ Thu, 14 Feb 2008 15:11:01 +0000 http://asymptotia.com/2008/02/13/mass-matters/#comment-109337 Bonus question for exam: use Schwarzschild's solution to show that for a satellite orbiting mass M, the centripetal force acting on the satellite vanishes at r=3M. Fun little exercise, indeed! You can see such a solution on page 8 of this paper: http://arxiv.org/PS_cache/gr-qc/pdf/0512/0512082v2.pdf This was the first paper I found on the subject... I believe that you'll find more "pedagogical" explanations if you search around a little more. ;) Bonus question for exam: use Schwarzschild’s solution to show that for a satellite orbiting mass M, the centripetal force acting on the satellite vanishes at r=3M.

Fun little exercise, indeed! You can see such a solution on page 8 of this paper:

http://arxiv.org/PS_cache/gr-qc/pdf/0512/0512082v2.pdf

This was the first paper I found on the subject… I believe that you’ll find more “pedagogical” explanations if you search around a little more. ;)

]]>