The Schwartzchild radius works out to about 3km per solar mass. So a Blackhole of mass 10Msun would have a radius of 30km. One with radius 10E+6MSun would have one of 30,000,000 KM, so since radius scales linearly with the mass, volume must go up like one over R^3.
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Date: 2008-11-03 07:49 am (UTC)