Question

what is the mass of a black hole​

Answer 1

Hello dear❤❤

Black holes often have stars or gas orbiting around them. It is then possible to measure the mass of the black hole, just by measuring the speed of the orbiting material. Consider the case in which a star and a black hole orbit around their mutual center of gravity.

HOPE IT HELPS...

Answer 2

Answer:

Stellar-mass black holes are typically in the range of 10 to 100 solar masses, while the super-massive black holes at the centers of galaxies can be millions or billions of solar masses. The super-massive black hole at the center of the Milky Way, Sagittarius A*, is 4.3 million solar masses

Explanation:

In the theory of general relativity, a black hole could exist of any mass. The lower the mass, the higher the density of matter has to be in order to form a black hole.  There are no known processes that can produce black holes with mass less than a few times the mass of the Sun. If black holes that small exist, they are most likely primordial black holes. Until 2016, the largest known stellar black hole was 15.65±1.45 solar masses. In September 2015, a rotating black hole of 62±4 solar masses was discovered by gravitational waves as it formed in a merger event of two smaller black holes.As of April 2008, 'XTE J1650-500' was reported by NASA  and others to be the smallest-mass black hole currently known to science, with a mass 3.8 solar masses and a diameter of only 24 kilometers (15 miles). However, this claim was subsequently retracted. The more likely mass is 5–10 solar masses.

There is observational evidence for two other types of black holes, which are much more massive than stellar black holes. They are intermediate-mass black holes (in the center of globular clusters) and super-massive black holes in the center of the Milky Way and other galaxies.