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A comment on Quench of LHC inner triplet magnet causes a small leak with major consequences. Parent comment

Re:Quench of LHC inner triplet magnet causes a small leak wi... by krisoft on Friday July 21, 2023 @08:38AM (#36813083)
> I also read it instantly in case they had a black hole on their hands, even though I'd expect us all to be dead almost instantly if any real "major consequence" event truly happened in the accelerators.

Idk why people think this. Black holes are not magic. They have exactly as much gravity as the mass had which collapsed into them.

As you go about your life right now the gravity of Switzerland is pulling you towards it a tiny bit. If due to some crazy event the mass of the whole country would collapse into a black hole that black hole would still tug you the same way and the same amount.

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Re:Quench of LHC inner triplet magnet causes a small leak wi... by ericd on Friday July 21, 2023 @09:53AM (#36813786)
I’m not a physicist, but it seems like they’re a little magic, in that they’re so far from our normal experience, since gravity is proportional to the inverse square of the distance, and the distance to their center of mass is relatively very small, so you can get an extremely strong pull relative to a normal object of the same mass. It seems like even a very small black hole falling onto things could snowball, unless there’s something that counters that? Do black holes lose material/get less dense/evaporate under certain conditions?
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Re:Quench of LHC inner triplet magnet causes a small leak wi... by jamesmaniscalco on Friday July 21, 2023 @12:26PM (#36815798)
Yes, black holes are theorized to evaporate due to Hawking radiation [0].

[0] https://en.wikipedia.org/wiki/Hawking_radiation

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Re:Quench of LHC inner triplet magnet causes a small leak wi... by marcosdumay on Friday July 21, 2023 @12:35PM (#36815947)
> Do black holes lose material/get less dense/evaporate under certain conditions?

They radiate something similar to heat (with wild possibilities for temperature).

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