User By Symmetry

25 votes

Accepted

Why aren't interactions between molecules of an ideal gas and walls of container negligible?

answered Nov 6, 2016 at 13:44

22 votes

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Does "natural" superposition of particles exist?

answered May 3, 2018 at 10:43

22 votes

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Why did the apple fall from the tree, vis-à-vis the second law of thermodynamics?

answered Jul 30, 2020 at 11:55

18 votes

Why is every electron in the universe not entangled with every other electron?

answered Oct 26, 2020 at 15:50

16 votes

Why does it take a projectile as long to get to its apex as it does to hit the ground?

answered Feb 15, 2015 at 14:10

16 votes

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Internal energy of an ideal gas as a function of volume

answered Aug 12, 2015 at 13:15

14 votes

Divergence of a field and its interpretation

answered Jul 13, 2014 at 19:23

13 votes

Why energy corresponding to most probable speed is not equal to most probable energy?

answered Apr 27, 2017 at 15:18

12 votes

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Two-dimensional electron gas

answered Jul 10, 2018 at 11:21

12 votes

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Do we need an orthonormal basis in Quantum Mechanics?

answered Jan 23, 2015 at 0:04

11 votes

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What is meant by the term "single particle state"

answered Apr 20, 2015 at 11:32

10 votes

Why does x ray diffraction take place in crystals as it seems to violate the law of conservation of energy?

answered Oct 1, 2022 at 12:12

10 votes

Why is the use of mathematics essential in advanced physics?

answered Nov 1 at 10:09

9 votes

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How to interpret $\langle x|\hat Q|x'\rangle$ for a quantum mechanical operator $\hat Q$?

answered Jan 15, 2018 at 13:29

9 votes

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How can a particle's position and velocity be the same all the time?

answered Mar 6, 2020 at 13:56

8 votes

Is it physically possible to bring water to its critical point?

answered Jul 11 at 21:45

8 votes

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Can momentum never be zero in quantum mechanics?

answered Mar 10, 2020 at 12:40

8 votes

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Earth-like Atmosphere Breaks Second Law of Thermodynamics due to Conduction?

answered Sep 17, 2018 at 11:52

8 votes

Statistical physics and momentum conservation

answered Nov 19, 2014 at 15:58

7 votes

How big is an excited hydrogen atom?

answered Nov 4, 2014 at 19:14

7 votes

Accepted

Explanation of Dirac's proof of arbitrary ket being expressible with eigenkets of observable

answered Jul 14, 2014 at 12:16

7 votes

What conditions do a bunch of atoms need to satisfy to have a temperature?

answered Jul 19, 2014 at 10:59

7 votes

How does Gauss's Law imply that the electric field is zero inside a hollow sphere?

answered Aug 22, 2016 at 18:05

7 votes

Accepted

QM: Why is the geometric phase not zero?

answered Jun 18, 2019 at 10:54

7 votes

What is meant when we say that a differential takes on a certain value?

answered Feb 14, 2021 at 13:43

6 votes

What happens on a finite negative well when the particle has smaller energie than the potential well?

answered Apr 25 at 18:06

6 votes

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Low temperature behavior for ferromagnets: theoretical and experimental discrepancies

answered Oct 2, 2022 at 14:11

6 votes

Accepted

Carnot's Engine Proof flawed?

answered Sep 29, 2018 at 12:23

6 votes

Understanding "natural variables" of the thermodynamic potentials using the example of the ideal gas

answered Jan 23, 2017 at 15:10

6 votes

How is entropy a state function?

answered Mar 16, 2017 at 16:28

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284 Answers

Why aren't interactions between molecules of an ideal gas and walls of container negligible?

Does "natural" superposition of particles exist?

Why did the apple fall from the tree, vis-à-vis the second law of thermodynamics?

Why is every electron in the universe not entangled with every other electron?

Why does it take a projectile as long to get to its apex as it does to hit the ground?

Internal energy of an ideal gas as a function of volume

Divergence of a field and its interpretation

Why energy corresponding to most probable speed is not equal to most probable energy?

Two-dimensional electron gas

Do we need an orthonormal basis in Quantum Mechanics?

What is meant by the term "single particle state"

Why does x ray diffraction take place in crystals as it seems to violate the law of conservation of energy?

Why is the use of mathematics essential in advanced physics?

How to interpret $\langle x|\hat Q|x'\rangle$ for a quantum mechanical operator $\hat Q$?

How can a particle's position and velocity be the same all the time?

Is it physically possible to bring water to its critical point?

Can momentum never be zero in quantum mechanics?

Earth-like Atmosphere Breaks Second Law of Thermodynamics due to Conduction?

Statistical physics and momentum conservation

How big is an excited hydrogen atom?

Explanation of Dirac's proof of arbitrary ket being expressible with eigenkets of observable

What conditions do a bunch of atoms need to satisfy to have a temperature?

How does Gauss's Law imply that the electric field is zero inside a hollow sphere?

QM: Why is the geometric phase not zero?

What is meant when we say that a differential takes on a certain value?

What happens on a finite negative well when the particle has smaller energie than the potential well?

Low temperature behavior for ferromagnets: theoretical and experimental discrepancies

Carnot's Engine Proof flawed?

Understanding "natural variables" of the thermodynamic potentials using the example of the ideal gas

How is entropy a state function?