Question

Can we know the age of a black hole ? Can we evaluate its mass ?​

Answer 1

Explanation:

From looking at the Black Hole alone, there is no possibility of determining its age. The state of the Black Hole is fully determined by a few fundamental variables (mass, angular momentum and electric charge). This is the statement of the famous dictum A black hole has no hair.

While it's not possible to accurately calculate the mass of a lone stellar-mass black hole created by the death of a single star, it is possible to calculate the mass of a galaxy's central supermassive black hole. This allowed them to use Kepler's laws to measure its mass: 4.3 million solar masses.

What is the mass of a black hole?

between about 3 and 10 solar masses

A typical stellar-class of black hole has a mass between about 3 and 10 solar masses. Supermassive black holes exist in the center of most galaxies, including our own Milky Way Galaxy. They are astonishingly heavy, with masses ranging from millions to billions of solar masses.

Can a black hole kill you?

The good news about massive black holes is that you could survive falling into one. Although their gravity is stronger, the stretching force is weaker than it would be with a small black hole and it would not kill you.

hope it's help you a lot

Answer 2

Answer:

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➡ No, We can't determine the age of a black hole.

➡ While it's not possible to accurately calculate the mass of a lone stellar-mass black hole created by the death of a single star, it is possible to calculate the mass of a galaxy's central supermassive black hole. ... This allowed them to use Kepler's laws to measure its mass: 4.3 million solar masses.

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