慢性胃炎可以吃什么水果
百度 要贯彻新时代党的建设总要求，推动工会系统全面从严治党向纵深发展。
The study of the large-scale structure, history, and future of the universe. Cosmology is about asking and answering questions about the "big picture" - the extent, origin, and fate of everything we know.
8 questions from the last 7 days
-8
votes
0
answers
43
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Gravitational force explained [closed]
Everyone still wonders why gravity exists and all matter and even opposing electrical forces attract. I have a crazy theory. Perhaps it’s because everything in the universe (all, including dimensions) ...
-1
votes
1
answer
100
views
Does physics strictly rule out the possibility that matter is eternal? [closed]
While the standard model of cosmology points to a beginning—often associated with the Big Bang—does modern physics strictly prohibit the idea that matter (or energy) has always existed? Or is there ...
- 19
10
votes
2
answers
898
views
Is there anything that can exist forever?
Is there any form of matter, particle, etc, that could persist indefinitely, even after the universe reaches its final state (like heat death, big crunch, or other ultimate fate)?
- 105
7
votes
1
answer
848
views
Is work being done as the universe is expanding?
As the universe is expanding is work being done? If so, where is the energy coming from?
0
votes
0
answers
45
views
What statistical inference should we make about the entropy of the early universe?
Loschmimdt's paradox is the idea that the time irreversible 2nd law of thermodynamics cannot be deduced from the time reversible fundamental laws of physics. A resolution to the paradox is that the ...
-1
votes
0
answers
36
views
Are non-equilibrium distributions from phase transitions taken into account? [closed]
I was reading an old post of mine:
If I have a quantum mechanical system (QMS) whose density matrix is at
temperature $T$ and I put it in contact with another quantum
mechanical system (QMS2) at ...
- 1,417
0
votes
1
answer
69
views
How many quark-antiquark pairs formed because of radiation pressure on baryons after the Big Bang?
Did quarks and antiquarks form after baryons formed due to stretching of baryons by radiation pressure and quark confinement in QCD theory?
- 89
-3
votes
0
answers
55
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Masters course recommendations in Spain or Italy [closed]
I am completing the final year of my bachelors next academic year in Trinity College Dublin in Theoretical Physics, which is a 4 year course which contains courses on QFT, the Standard Model, ...
