1

Physics, Astronomy & Cosmology / Have you seen this? Have you heard about this?

« on: 04/11/2010 21:27:34 »

http://listverse.com/2010/11/04/10-strange-things-about-the-universe/

That is all I have to say.

2

Physics, Astronomy & Cosmology / Can you have two objects have equal density but not equal mass??

« on: 22/10/2010 22:42:52 »

Or does this only work as 'equal mass but not equal density'?

Or rather, if I had a ball of tin 25,000 miles wide, and a ball of manganese 50,000 miles wide (we're talking spherical with no surface imperfections, equivalent in every way except in diameter) would they have the same gravitational pull?

Bonus question, how important is density when relating to gravitational force?