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Anonymous at Thu, 27 Jun 2024 10:01:50 UTC No. 16256365
>by Newton's shell theorem, the force of gravity falls to zero towards the center of a sphere/ball of mass
>the centrifugal forces of a spinning planet are strong enough to give it an equatorial bulge and flatten the poles
>somehow cosmologists still believe that planets are densest at their center, despite the fact that there is no gravity to keep them that way and centrifugal forces should displace any central mass towards the crust
When did you first realize that the Earth is hollow, /sci/?
Anonymous at Thu, 27 Jun 2024 10:04:07 UTC No. 16256366
Learn what pressure is, dumbass
Anonymous at Thu, 27 Jun 2024 10:10:05 UTC No. 16256370
>>16256365
>somehow cosmologists still believe that planets are densest at their center, despite the fact that there is no gravity to keep them that way
people who haven't gone to university should be banned from this board
Anonymous at Thu, 27 Jun 2024 10:52:51 UTC No. 16256413
>>16256365
I figured it out after mastering this thesis.
https://scarab.bates.edu/cgi/viewco
Anonymous at Thu, 27 Jun 2024 12:35:37 UTC No. 16256539
>>16256365
>>by Newton's shell theorem, the force of gravity falls to zero towards the center of a sphere/ball of mass
Yes, but not the pressure. At the center of the planet, the force of gravity is effectively zero, but all else around you is still being pulled into you. The pressure is at its maximum there.
Anonymous at Thu, 27 Jun 2024 12:47:05 UTC No. 16256550
>>16256366
F/A. No force, no pressure. Simple as.
Anonymous at Thu, 27 Jun 2024 12:48:06 UTC No. 16256552
>>16256539
>Zero force implies maximum pressure
Please don't tell me you actually believe this.
Anonymous at Thu, 27 Jun 2024 13:42:18 UTC No. 16256609
>>16256552
You might legit be retarded
Anonymous at Thu, 27 Jun 2024 14:14:58 UTC No. 16256645
>>16256552
>Please don't tell me you actually believe this.
You're not understanding it, it is a bit of a mind-fuck when you first hear it, it was for me as well when I first deduced it, and later on actually learned about it in college geology: if you're at the center of mass of the planet, as you said, all gravity force vectors cancel out. But, the mass around you, from the core to the surface, is not at the center, obviously. All that mass is under the effect of gravity, and is weighting down upon itself, from the surface to the center, and it all wants to go to the center. It's all pushing down, and the molecular bonds in that rock is resisting that compression at the same time, increasing the pressure. The further down towards the core you go, the more mass is above trying to go to the core and crushing in, while the molecular bonds keep resisting.
At the center, that effect is at its strongest. That's we're the most mass is around, crushing in.
And we can see this ourselves in boreholes and mines: the deeper you go, the more compressive stresses the rock endures. The rock eventually starts to spall; shards pop out from cave and borehole walls, such is the compression from all sides except from the void of the cave/borehole.
I was hoping to find some good diagrams explaining rock spallation but the subject is so niche in structural geology that not much pops out. I need to improve wikipedia on that front. Note taken.
I found a decent paper you can glance through, unfortunately it's a pdf, but here you go:
https://static.rocscience.cloud/ass
Anonymous at Thu, 27 Jun 2024 14:17:53 UTC No. 16256651
>>16256645
>rock spallation
>not much pops out
I typed a pun and didn't even realize it, lol
Anonymous at Thu, 27 Jun 2024 14:27:55 UTC No. 16256661
>>16256645
found a better one anon, lots of nice figures for you:
https://tu-freiberg.de/sites/defaul
Anonymous at Thu, 27 Jun 2024 14:30:14 UTC No. 16256666
>>16256661
ok, forget the term spallation for now, look instead for "borehole breakouts", lots of content out there.
Sorry, it's been over 20 years since I've studied this shit and it's not my field of work.
Anonymous at Fri, 28 Jun 2024 06:51:32 UTC No. 16257794
>>16256365
>When did you first realize that the Earth is hollow, /sci/?
BTFO, kek
dummy