Top Questions

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0
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0
answers
7
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How do I find the force on the charged sphere due to a dipole sitting inside?

forces electrostatics
12m ago Qmechanic 11.3k
1
vote
0
answers
19
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How do the Einstein's equations come out of string theory?

general-relativity string-theory
16m ago Qmechanic 11.3k
0
votes
0
answers
5
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Why does the spotlight reflected off of a rectangular mirror tend to become circular?

visible-light reflection
23m ago Adnan 103
0
votes
1
answer
64
views

Inhomogenous schrodinger equation

quantum-mechanics schrodinger-equation non-linear-dynamics
24m ago Qmechanic 11.3k
0
votes
1
answer
10
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How to determine whether a large container is air-tight?

engineering
35m ago Ferdinando Randisi 458
7
votes
0
answers
147
views

What accounts for the discrepancies in my calculations of year lengths?

astronomy time orbital-motion definition
40m ago raxacoricofallapatorius 830
0
votes
1
answer
18
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Force on a bar magnet

electromagnetism magnetic-fields
40m ago Raindrop 50
2
votes
2
answers
199
views

Does the length of the sidereal day vary systematically?

astronomy orbital-motion coordinate-systems precession
55m ago raxacoricofallapatorius 830
2
votes
1
answer
12
views

What is the maximum mass of planet HD 40307 g

astrophysics newtonian-gravity planets
1h ago shiplu.mokadd.im 111
0
votes
1
answer
31
views

What caused Simon Faithfull's chair to fall appart?

fluid-dynamics air atmospheric-science
1h ago John Rennie 27k
0
votes
1
answer
20
views

Vector Nature Of Angular Velocity

vectors rotation coordinate-systems rotational-kinematics angular-velocity
1h ago Luboš Motl 52.9k
4
votes
3
answers
118
views

Effect of a wavefront deformation on the far-field diffraction pattern of a TEM00

optics fourier-transform diffraction
1h ago Javier 1
2
votes
1
answer
419
views

The most efficient Fan Blade Design

forces engineering fan
1h ago Martin Beckett 8,088
4
votes
2
answers
470
views

A quantitative explanation of coherence domains

quantum-field-theory fluid-dynamics many-body
1h ago dbaseman 436
0
votes
1
answer
55
views

How to prove equations for energy of a wave

waves
2h ago Community 1
4
votes
4
answers
531
views

Why doesn't air freeze?

temperature
2h ago fdf 1
2
votes
2
answers
654
views

When can I use Wick's theorem?

quantum-mechanics quantum-field-theory path-integral perturbation-theory wick-theorem
2h ago Qmechanic 11.3k
0
votes
1
answer
35
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Integration of constant: $\int dp = \Delta p$ in impulse formula

momentum integration
2h ago Claudius 867
6
votes
3
answers
81
views

Quantum mechanics textbooks that use path integrals

quantum-mechanics books path-integral
2h ago Qmechanic 11.3k
1
vote
1
answer
25
views

Potential for charge distribution, finiteness

electrostatics mathematics integration
2h ago Qmechanic 11.3k
0
votes
0
answers
26
views

Plane wave expansion in cylindrical coordinates

quantum-mechanics wavefunction scattering
2h ago Qmechanic 11.3k
1
vote
2
answers
34
views

For a fixed power input, is it better to hit something with a light rod or a heavy rod?

newtonian-mechanics
3h ago TerryTate 6
0
votes
1
answer
17
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Units of azimuthally integrated radiant intensity

electromagnetic-radiation
4h ago Luboš Motl 52.9k
2
votes
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