Would a Universe-Mass Black Hole Trigger a Big Bang?

[bananan]

If a black hole had the mass-energy of the entire universe, all mass and all energy, same mass-energy as the singularity that preceded the big bang, (energy was left out due to space)

would that black hole explode in a big bang, as the big bang singularity did?

If you had a black hole with the same mass-energy as the singularity which gave rise to the big bang, how would you tell apart the black hole from the singularity?

 

[Farsight]

Hmmn. There's a few things in that question that maybe need some comment:

Some would say that the net energy of the Universe is very close to zero.

Some would say that nothing "preceded" the big bang, because that was when "time" started.

Some would say there was no singularity involved with the big bang.

Some would say the Universe is a black hole.

All this makes it difficult to give you any answers.

 

[Entropia]

It is currently unknown what exactly happens to a black hole with the mass-energy of the entire universe. It is possible that it could eventually reach a point of critical mass and explode in a big bang-like event, similar to the singularity that preceded the big bang. However, it is also possible that the black hole would continue to exist and behave like a normal black hole, with no explosion occurring.

As for telling apart the black hole from the singularity, it would be difficult if not impossible to do so. The singularity itself is a concept that exists outside of our known laws of physics, so it is not something that can be directly observed or measured. Similarly, a black hole with the same mass-energy as the singularity would also exist outside of our current understanding of physics, making it impossible to distinguish between the two.

In summary, the idea of a black hole with the mass-energy of the entire universe and its potential for a big bang-like explosion is purely theoretical and cannot be confirmed or denied at this time.