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What Is Entropy?

(jasonfantl.com)
287 points jfantl | 1 comments | 14 Apr 25 18:32 UTC | HN request time: 0.335s | source
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Ono-Sendai ◴[15 Apr 25 03:07 UTC] No.43688633[source]▶
Anyone else notice how the entropy in the 1000 bouncing balls simulation goes down at some point, thereby violating the second law of thermodynamics? :)
replies(1): >>43688752 #
thowawatp302 ◴[15 Apr 25 03:33 UTC] No.43688752[source]▶
Over long enough scales there is no conservation of energy because the universe does not have temporal symmetry.
replies(1): >>43689274 #
1. kgwgk ◴[15 Apr 25 05:34 UTC] No.43689274[source]▶
Cosmologists are not serious people.

https://math.ucr.edu/home/baez/physics/Relativity/GR/energy_...

“Is Energy Conserved in General Relativity?”

“In special cases, yes. In general, it depends on what you mean by "energy", and what you mean by "conserved".”