4 ms·
The water level decreases, along with the shore and anything with it falling within the event horizon. Any other apocalyptic brain teasers?
by RealityVoid 2mo ago
The water level decreases, along with the shore and anything with it falling within the event horizon. Any other apocalyptic brain teasers?
- anonym29 2mo agoYou drop a bowling ball off a space boat into a black hole. Has the amount of mass inside the universe increased, decreased, or stayed the same, ignoring the effects of all other changes?
- RealityVoid 2mo agoThe amount of mass inside the universe has stayed the same, it just moved from the boat into the black hole. You're really bored at work one day so to entertain yourself you create 1kg of antimatter along with 1kg of matter. Has the mass in the universe increased or stayed the same?
- kontain 2mo agoThe mass of the observable universe has probably changed a lot by the time the bowling ball hits the bottom.
- TheOtherHobbes 2mo agoYou drop a black hole the size of a bowling ball into a frontier AI startup. At what point does NVIDIA give you $200bn?
- inigyou 2mo agoAt the point nvidia's office becomes part of the accretion disk.
- M95D 2mo agoI'm not sure what other effects I should ignore, but the mass would increase. The ball gains relativistic mass as it accelerates towards the black hole. PS: Assuming the boat isn't falling too (it's still in orbit), dropping the ball does nothing. You need to decelerate it (reduce it's orbital speed) for it to fall into the black hole.
- Paul_Clayton 2mo agoI think a microscopic black hole would evaporate very quickly from Hawking radiation, so the result might be more bang than suck.
- RealityVoid 2mo agoSure, but the mass is not specified so I just assumed the closest one to cosmic horror.
- inigyou 2mo agoYou invert the phase of the Higgs field within a basketball. What happens?
- kot_manul 2mo agoThe universe becomes suddenly VERY different, while a ghostly rendition of the Harlem Globetrotters theme whistles eerily in the background? (I actually don't know the answer to this)
- 12_throw_away 2mo agoI believe this would nucleate a cosmic string (and annihilate everything in its vicinity obviously)
- ThrowawayR2 2mo agoThe intake rate of a microscopic black hole is too small to measurably absorb much matter before it falls through to the bottom of the lake until it reaches the center of the planet and oscillates there. The more pressing thing is that every thing around the lake is irradiated by the evaporation of the microscopic black hole, which supposedly emits quite a lot of energy, as it falls through the bottom.
- RealityVoid 2mo agoAccording to wikipedia, microscopic is considered up to 1 micron. [1] According to the Schwartzchild formula [2] r=(2Gm)/(c^2) so if I take the largest black hole the definition would allow, the mass would be about 10% of the moon. You'd feel 1G at about 60km distance because of it. But indeed, it would fall and take about 20 minutes to reach the core of the planet, while displacing a whooping 1gram of matter. Kind of funny how wierd this whole thing is. [1] https://en.wikipedia.org/wiki/Microscopic_scale https://en.wikipedia.org/wiki/Microscopic_scale [2] https://en.wikipedia.org/wiki/Schwarzschild_radius https://en.wikipedia.org/wiki/Schwarzschild_radius