Physics puzzle - say you had a ball 10 cm in diameter. Is there a certain density at which point the ball would plummet through the Earth until it reached the center?
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Replying to @octonion
Why is this a puzzle? Seems like a straightforward if complicated and tedious calculation. I’d guess it would happen at near neutron star density.
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Replying to @vgr
But would a 10 cm ball of neutron star material be stable?
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Replying to @octonion
I think so? It’s larger ones that collapse into singularities not smaller. There’s probably an evaporation rate or something. Cosmic scale weirdness is far more than we’re used to.
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I mean even the fact that the earth is spherical is fundamentally weird. It is big enough it behaves like a water drop in hydrostatic equilibrium rather than solid matter we’re used to.
10:41 PM - 22 Nov 2020
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