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Top Questions
11
votes
Are there any nonlinear Schrödinger equations?
quantum-mechanics
schroedinger-equation
superposition
linear-systems
non-linear-schroedinger
asked Jul 12, 2022 at 20:16
physics.stackexchange.com
10
votes
Is there a "fundamental problem of thermodynamics"?
thermodynamics
asked Dec 5, 2022 at 14:40
physics.stackexchange.com
6
votes
Why is the neutron cross section of hydrogen larger than that of deuterium?
nuclear-physics
neutrons
nuclear-engineering
asked Jul 14 at 12:08
physics.stackexchange.com
6
votes
Why isn't the free expansion of a gas in an adiabatic container isentropic?
thermodynamics
entropy
ideal-gas
reversibility
adiabatic
asked Oct 2, 2022 at 14:17
physics.stackexchange.com
6
votes
Were there any explanations as for the stability of matter before the advent of quantum mechanics?
quantum-mechanics
condensed-matter
atomic-physics
history
stability
asked Nov 2, 2022 at 15:59
physics.stackexchange.com
Top Answers
18
Do electrons occupy higher energy levels to become excited? Or do they become excited to occupy higher energy levels? What's the causal relationship?
physics.stackexchange.com
6
Exact Differentials and thermodynamics
physics.stackexchange.com
6
How is thermal energy split between kinetic energy and potential energy?
physics.stackexchange.com