User Thomas

59 votes

Is there any hard scientific evidence that the alpha particle is tetrahedral?

answered Feb 4, 2017 at 16:47

24 votes

Accepted

Is the speed of sound almost as high as the speed of light in neutron stars?

general-relativity astrophysics condensed-matter nuclear-physics

answered Feb 22, 2013 at 19:01

22 votes

Turbulent spacetime from Einstein equation?

general-relativity gravity spacetime turbulence non-linear-systems

answered Nov 30, 2015 at 19:51

22 votes

Accepted

Why Does Lattice QCD Use Heavier Than Physical Masses For Calculations?

mass computational-physics quantum-chromodynamics lattice-model

answered Mar 27, 2017 at 23:07

21 votes

Why can't the Navier Stokes equations be derived from first principle physics?

fluid-dynamics navier-stokes models non-linear-systems

answered Jun 29, 2015 at 14:04

19 votes

How is the entropy at the time of the Big Bang calculated?

thermodynamics entropy big-bang

answered Nov 3, 2019 at 15:45

14 votes

Accepted

Derivation of Ohm's Law

electromagnetism electric-circuits solid-state-physics electric-current electrical-resistance

answered Oct 16, 2012 at 3:29

14 votes

Accepted

Relativity of temperature paradox

special-relativity statistical-mechanics temperature kinetic-theory doppler-effect

answered Jun 17, 2016 at 13:50

14 votes

Accepted

Standard Model Proton Decay Rate

particle-physics standard-model weak-interaction proton-decay

answered Oct 26, 2016 at 4:27

13 votes

Accepted

Weak isospin confinement?

particle-physics standard-model gauge-theory confinement

answered Oct 4, 2012 at 1:15

13 votes

Why hasn't Peter Higgs solved the Yang-Mills prize problem?

quantum-field-theory mass higgs yang-mills confinement

answered Feb 3, 2020 at 4:40

11 votes

Accepted

Dispersion of ferromagnetic ($E\propto k^2$) and antiferromagnetic ($E\propto k$) spin wave

quantum-field-theory symmetry-breaking dispersion

answered Dec 29, 2012 at 15:15

11 votes

Why surface water waves are dispersive?

fluid-dynamics waves dispersion

answered May 15, 2021 at 16:19

10 votes

Accepted

Bound states and scattering length

quantum-mechanics quantum-field-theory statistical-mechanics condensed-matter solid-state-physics

answered Jul 13, 2013 at 16:20

10 votes

Accepted

How does the Kosterlitz-Thouless transition not violate the Mermin-Wagner theorem?

condensed-matter phase-transition symmetry-breaking topological-order

answered Oct 13, 2016 at 20:18

10 votes

Why don't neutrons cluster on their own?

nuclear-physics neutrons

answered Mar 10, 2016 at 19:39

9 votes

Accepted

Rigorous derivation of Fick's first law

diffusion

answered Jan 19, 2016 at 2:32

9 votes

Relation between master, Fokker-Planck, Langevin, Kramers-Moyal and Boltzmann equations

statistical-mechanics resource-recommendations kinetic-theory stochastic-processes

answered May 26, 2016 at 17:02

9 votes

In a fluid, why are the shear stresses $\tau_{xy}$ and $\tau_{yx}$ equal?

fluid-dynamics symmetry stress-energy-momentum-tensor

answered May 31, 2015 at 21:28

9 votes

How loud is the thermal motion of air molecules?

acoustics temperature brownian-motion

answered May 24, 2021 at 4:22

9 votes

Accepted

Gapless superconductivity

quantum-mechanics condensed-matter superconductivity

answered May 28, 2021 at 15:58

9 votes

Accepted

Is there a pressure gradient in a stationary gas with a temperature gradient?

thermodynamics pressure temperature ideal-gas kinetic-theory

answered Aug 12, 2021 at 18:27

9 votes

Is the Navier-Stokes equation valid in $d=2$ spatial dimensions?

fluid-dynamics kinetic-theory diffusion navier-stokes brownian-motion

answered Oct 16, 2021 at 13:00

8 votes

Is there a quantum analogue of the "Tennis Racket" theorem?

quantum-mechanics classical-mechanics moment-of-inertia rigid-body-dynamics stability

answered Sep 30, 2020 at 14:02

8 votes

Accepted

What's the difference between a meson and a glueball?

quantum-chromodynamics gluons mesons

answered Apr 22, 2017 at 14:43

8 votes

Gluon photon mixing -- why not?

gluons

answered Sep 23, 2017 at 18:17

7 votes

Accepted

Non-uniqueness of the Order Parameter and its Critical Exponent

statistical-mechanics condensed-matter phase-transition critical-phenomena

answered Feb 10, 2019 at 22:24

7 votes

Understanding typical non-perturbative calculations in QFT

quantum-field-theory path-integral quantum-anomalies instantons non-perturbative

answered Jan 6, 2017 at 14:53

6 votes

Accepted

Are all diffusion-like processes described as wave-like in relativity-compatible formulations?

thermodynamics special-relativity waves relativity differential-equations

answered May 15, 2016 at 16:13

6 votes

Accepted

Wilson Loop in AdS/CFT

homework-and-exercises string-theory ads-cft wilson-loop

answered Mar 28, 2016 at 0:27

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341 Answers

Is there any hard scientific evidence that the alpha particle is tetrahedral?

Is the speed of sound almost as high as the speed of light in neutron stars?

Turbulent spacetime from Einstein equation?

Why Does Lattice QCD Use Heavier Than Physical Masses For Calculations?

Why can't the Navier Stokes equations be derived from first principle physics?

How is the entropy at the time of the Big Bang calculated?

Derivation of Ohm's Law

Relativity of temperature paradox

Standard Model Proton Decay Rate

Weak isospin confinement?

Why hasn't Peter Higgs solved the Yang-Mills prize problem?

Dispersion of ferromagnetic ($E\propto k^2$) and antiferromagnetic ($E\propto k$) spin wave

Why surface water waves are dispersive?

Bound states and scattering length

How does the Kosterlitz-Thouless transition not violate the Mermin-Wagner theorem?

Why don't neutrons cluster on their own?

Rigorous derivation of Fick's first law

Relation between master, Fokker-Planck, Langevin, Kramers-Moyal and Boltzmann equations

In a fluid, why are the shear stresses $\tau_{xy}$ and $\tau_{yx}$ equal?

How loud is the thermal motion of air molecules?

Gapless superconductivity

Is there a pressure gradient in a stationary gas with a temperature gradient?

Is the Navier-Stokes equation valid in $d=2$ spatial dimensions?

Is there a quantum analogue of the "Tennis Racket" theorem?

What's the difference between a meson and a glueball?

Gluon photon mixing -- why not?

Non-uniqueness of the Order Parameter and its Critical Exponent

Understanding typical non-perturbative calculations in QFT

Are all diffusion-like processes described as wave-like in relativity-compatible formulations?

Wilson Loop in AdS/CFT