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what fundalmentel force does a black hole based on?

It seems people is very unfamilar with black holes.

I will take a guess, is it electromantic force? please explain.

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Look at: – Benjamin Horowitz Jun 26 '12 at 17:18
I think gravity is the inward force but what is the outward force that keeps it from collapsing to a singularity? (some theories say that the singularity does not exist) – Jus12 Jun 27 '12 at 14:23
up vote 4 down vote accepted

The simple answer is in this wikipedia article:

A black hole is a region of spacetime where gravity prevents anything, including light, from escaping.1 The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole .

So it is gravity that causes the black hole's existence.

It needs college level courses to be able to work with the physics of the situation.

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