... as the mass of the black hole increases, so while an earth- mass black hole would have a density of 2 1030 kg/m3, a supermassive black hole of 109 solar masses ...
...2.1.4 Rotational effects 2.1.5 Black holes 2.2 Cosmological effects... 8 Addition of velocities 9 Mass , momentum, and energy 10 Relativistic mass 11...
... based on a Cs atom unperturbed by black -body radiation, and that the frequencies of primary frequency... that: "The kilogram is the unit of mass ; it is equal to the mass of the international prototype of...