this post was submitted on 31 Oct 2023
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A black hole about 2cm across filled entirely with protons.
Pretty sure they are not protons anymore once something is inside it.
The positive charge would remain though
Is that so? I assumed that a small black hole would rip apart a proton through spaghettification, therefore it won't have two up quarks and one down quark. But even if the charge remains, such information can't escape therefore its electric charge won't influence the universe.
I might need to read up more on this.
Yup, there's a theorem ("no-hair theorem") that the only information about a black hole which does influence the universe is its mass, spin, and electric charge.
Oh, I stand corrected.
You may be right, but I have yet to have evidence to the contrary.
Well, a black hole 2cm in diameter is basically the mass of the Earth, and protons are positive. Gravity would attract the two, so the black hole would impact the earth. Criteria are fulfilled. It's the biggest positive impact.