Trippy Turtle said:
Wyes said:
Trippy Turtle said:
Well I'm no physicist but if something had no mass (Black hole) and traveled faster then light then the mass wouldn't increase and it would just continue. Do these things have any mass?
Just for the record, black holes definitely have mass =P usually at least 10 times the mass of our Sun.
I thought that black holes had infinite density but no mass. I really need to learn more about physics.
Infinite density because it has no
volume.
Two things to put you on the right track about this intuitively;
Firstly, without mass, you don't have gravity (directly from Newton's law of gravity, GMm/(r^2), or from General Relativity but I have to admit I don't know much about it).
Secondly, density is the amount of mass in a certain volume. Or, density = mass/volume. So if the mass is zero, the density is zero. However, as the volume approaches 0 (because we can't divide by zero, we don't know how to), the density goes off to infinity.