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Top Questions

0 votes
1 answer
238 views

Is the Borde-Guth-Vilenkin Theorem applicable in cosmologies based on Einstein-Cartan Theory?

1 vote
3 answers
176 views

Dyson expansion for the density matrix

6 votes
2 answers
2k views

Do infinite dimensional systems make sense? [closed]

0 votes
0 answers
8 views

Is $\vec{B}=0$ in an infinite cylinder with localized magnetization?

0 votes
0 answers
13 views

Where would we end up if we'd travel for an infinite amount of time, faster than light, in a straight line, faster than the expansion of the universe?

1 vote
2 answers
267 views

Energy required to accelerate from different reference frames

9 votes
5 answers
2k views

Why is it impossible for the reactor of the nuclear power plant to turn into an explosive nuclear bomb?

0 votes
0 answers
13 views

How to determine current as a function of time in an RLC circuit with variative capacitor?

0 votes
1 answer
29 views

Understanding Killing vectors of FLRW metric

1 vote
2 answers
110 views

Is there any clear and concrete proof that says the Earth is rotating and orbiting? [duplicate]

1 vote
2 answers
31 views

Contradicting Changes in a Lagrangian under Transformation

0 votes
0 answers
16 views

If we put a number of identical boxes on top of each other and apply a linearly increasing force to the bottom, will they start slipping one by one?

18 votes
4 answers
2k views

Is it correct to say that it is theoretically impossible for perfect rigid bodies to exist?

3 votes
2 answers
35k views

Gauss's Law for inside a long solid cylinder of uniform charge density?

0 votes
0 answers
16 views

Are there any theories of the beginning or the end of the universes where all fundamental symmetries would be violated?

3 votes
2 answers
405 views

Physical Intuition for thermodynamic limit of the average occupancy, $\langle N\rangle$, of an orbital

0 votes
0 answers
12 views

Why can the hole of a cavity-hole model be considered a radiating blackbody?

6 votes
2 answers
915 views

Wiedemann-Franz law

3 votes
0 answers
35 views

What exactly do we observe in particle accelerators that we have named "particles"?

0 votes
0 answers
7 views

How, if, does the inside air of a football influence it's motion?

0 votes
0 answers
12 views

UV light Skin depth for a Glass

0 votes
1 answer
11 views

What will happen if the inner walls of the perfect blackbody(shown in the image) is made perfectly reflecting?

0 votes
0 answers
7 views

Couldn't understand an example used in explaining fundamental and derived quantities

1 vote
1 answer
47 views

Could there be some process or event that would make the universe to be Lorentz non-invariant?

0 votes
0 answers
13 views

Extended Conformal Thin-sandwich Method

0 votes
1 answer
384 views

Electric potential across dielectric interface

0 votes
3 answers
188 views

Does the vacuum really have infinite energy density?

1 vote
2 answers
1k views

Can we determine the surface temperature of stars other than the Sun by using black body radiation theory?

1 vote
2 answers
60 views

Criterion for stationary density matrix

0 votes
0 answers
4 views

The question about Fresnel numbers in the case of Fresnel diffraction

0 votes
0 answers
11 views

Intensity and luminious intestity on photographs of diffraction pattern

0 votes
0 answers
11 views

Spin correlation function in a Heisenberg model and its relationship to Green function in Hubbard model

1 vote
1 answer
29 views

How to reduce magnetic field between two magnetic shield sheets (silicon steel sheets)?

2 votes
1 answer
138 views

Why is the isotope Nitrogen-14 formed preferentially to Nitrogen-15 in the CNO-cycle in stars?

1 vote
1 answer
39 views

Do the null geodesics of photons emitted by Hawking radiation arise from the event horizon?

0 votes
3 answers
87 views

Can you see on Miller's planet?

-1 votes
1 answer
24 views

Assuming the photon has a moving mass, why current quantum mechanics is unable to prove or deny it?

0 votes
0 answers
15 views

Is this kind of laser device possible?

2 votes
2 answers
41 views

Doubts about direction of normal contact force acting on a tilted rod supported by another body

0 votes
0 answers
3 views

Should the magnetic force on the edge of iron bar B attached to a magnet A with lenght of B - L beign calculated with relatve permeability constant

0 votes
1 answer
336 views

Airflow velocity and volume loss due to friction

-1 votes
0 answers
30 views

A puzzling simple question on thermodynamics [closed]

3 votes
2 answers
182 views

Do supermassive black holes at galactic centers and the galaxis containing them spin in the same axis?

0 votes
0 answers
17 views

How is energy conserved in interference of light waves? [duplicate]

0 votes
1 answer
2k views

Source for Nusselt number correlation for cooling sphere under forced convection

0 votes
0 answers
24 views

Why laplacian appear in so many places? [duplicate]

2 votes
0 answers
50 views

Computing Gravitational constant $G$ from Cavendish's data

1 vote
1 answer
47 views

To what extent can phase transitions be made rigorous?


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