Black holes are objects whose gravitational pull is so great that not even light can escape from their surface. The speeds that a black hole can turn depends on the history of its initial formation, but it is believed that it can reach relativistic speeds, in GRS 1915 105 rotation it can turn up to 1150 times per second, which is around 98.5% of the speed of light and it is believed that the escape velocity of a black hole would be of a value of 300,000 km/s or more. The type of mass depends on

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