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Physics, Astronomy & Cosmology / Does gravity vary with temperature?
« on: 14/01/2009 19:14:50 »
How can a cold object possible have a higher gravitational 'field' than a hot one? That makes no sense to me. We know that gravity is proportional to mass. We know that mass increases as you add energy (although I agree the amount is very tiny indeed), and the corrolory is that it decreases with less energy. That means that a hot object has more mass than a cold one and the corollary of that is that a hot object has a higher gravity than a cold one (albeit so tiny that it would probably be undetectable)....