Hacker News
new
|
past
|
comments
|
ask
|
show
|
jobs
|
submit
login
streamofdigits
on Aug 25, 2021
|
parent
|
context
|
favorite
| on:
HyperPhysics (2016)
no, cyclic in this context means that all macroscopic system variables (temperature etc) return to their initial conditions
eurasiantiger
on Aug 25, 2021
[–]
Funny, I wasn’t aware we were aware of the initial conditions of the non-onservable universe.
bocklund
on Aug 25, 2021
|
parent
|
next
[–]
It's not "initial conditions" as in time=0. Thermodynamic state variables are path independent, so "initial conditions" in this context means the conditions of the reference point in the process from the point you start measuring.
google234123
on Aug 25, 2021
|
parent
|
prev
[–]
Why wouldn’t they be different than the initial conditions of the observable universe?
eurasiantiger
on Aug 25, 2021
|
root
|
parent
[–]
I wasn’t aware we are aware of those, either. In any case, the non-observable universe is certainly a superset of the observable universe.
google234123
on Aug 28, 2021
|
root
|
parent
[–]
We have some ideas... anyway, what do the initial conditions of our universe have to do with this one definition of the 2nd law?
Guidelines
|
FAQ
|
Lists
|
API
|
Security
|
Legal
|
Apply to YC
|
Contact
Search:
