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Unformatted text preview: ) can be equal to (for 1.8110 8 solar mass black holes) or less than (for >1.8110 8 solar mass black holes) the density of water  . This is because the Schwarzschild radius is directly proportional to mass , while density is inversely proportional to the volume. Since the volume of a spherical object (such as the event horizon of a non-rotating black hole) is directly proportional to the cube of the radius, the density of a black hole is inversely proportional to the square of the mass, and thus higher mass black holes have lower average density. The tidal forces in the vicinity of the event horizon are significantly weaker. Since the central singularity is so far away from the horizon, a hypothetical astronaut traveling towards the black hole center would not experience significant tidal force until very deep into the black hole....
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