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> would be indistinguishable from a black hole fed entirely by the equivalent matter

> one black hole with electrons and the other black hole with anti-protons

But electrons and anti-protons are not equivalent. Positrons are.

That's what I meant -- if the same energy of electrons and positrons are used, the black holes would not be indistinguishable, their charges would be different.



Oh, I see what you're getting at. Yes, the Q would be flipped. M, though, stays the same.

Sometimes I think the "anti-" prefix has done more harm than good to communicate what's going, like the choice of assigning "negative" to electrons.




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