Hottest Questions This Week - Physics Stack Exchange

6 votes

6 answers

3k views

Why is pressure in the outermost layer of a star lower than at its center?

RC_23

9,353

modified 20 hours ago

8 votes

4 answers

5k views

Imagining Graham's number in your head collapses your head to a black hole

mmentin

19

modified 2 days ago

7 votes

2 answers

2k views

Do thermodynamic cycles occur only in human-made machines?

anjama

311

answered yesterday

6 votes

3 answers

1k views

In equation (3) from lecture 7 in Leonard Susskind’s ‘Classical Mechanics’, should the derivatives be partial?

Buzz♦

16.3k

modified Jul 1 at 23:17

2 votes

7 answers

1k views

Do known physical systems all have a unique time evolution?

Roger V.

59.6k

answered Jul 1 at 12:28

4 votes

3 answers

849 views

Is the zero vector necessary to do quantum mechanics?

peterh

8,247

answered Jun 30 at 18:18

4 votes

3 answers

485 views

Why potential energy is not considered in the internal energy of diatomic molecules?

Bob D

73.4k

modified Jun 30 at 13:02

3 votes

2 answers

520 views

Does this double well potential contradict the fact that there is no degeneracy for one-dimensional bound states?

Qmechanic♦

206k

modified Jun 30 at 7:54

3 votes

2 answers

643 views

Is non-temperature related Symmetry Breaking possible?

Roger V.

59.6k

answered Jul 1 at 8:57

5 votes

4 answers

543 views

Do you always experience the gravitational influence of other mass as you see them in your frame?

Sten

6,305

answered 26 mins ago

4 votes

3 answers

818 views

What effects could cause a laser beam inside a pipe to bend?

uhoh

6,253

answered yesterday

4 votes

4 answers

279 views

Why does the length of an antenna matter when electromagnetic waves propagate perpendicular to the antenna?

Ján Lalinský

38.7k

modified 4 hours ago

3 votes

3 answers

559 views

Path integral at large time

Kutasov

141

modified yesterday

6 votes

4 answers

263 views

Why is half-integer spin not observed classically? [duplicate]

MadMax

4,379

modified Jul 2 at 15:04

2 votes

1 answer

631 views

Can a satellite generate electricity by using a planet's magnetic field? [duplicate]

Penguino

2,976

modified Jul 1 at 21:19

1 vote

2 answers

323 views

How to determine if gravity is roughly linear?

Mozibur Ullah

13.1k

modified Jun 30 at 14:34

2 votes

2 answers

205 views

Why we use trace-class operators and bounded operators in quantum mechanics?

Valter Moretti

73.3k

modified Jun 30 at 9:03

1 vote

3 answers

91 views

Do clocks tick faster when gravitational forces are weaker?

Qmechanic♦

206k

modified Jul 2 at 16:28

-1 votes

2 answers

118 views

Is Schrodinger's cat a problem of how we define identity?

Agnius Vasiliauskas

13.9k

modified Jul 1 at 10:51

1 vote

3 answers

65 views

How much time does it take for an object to fall from space? [closed]

Mauricio

5,558

modified yesterday

1 vote

1 answer

222 views

Vacuum flucutuations = local entanglement between quantum fields?

alanf

8,458

answered yesterday

3 votes

3 answers

163 views

How does the temperature of the condenser impact an air conditioner's energy usage?

david

149

answered yesterday

3 votes

1 answer

233 views

Derivation of two-body Coulomb interaction in momentum space

Tobias Fünke

7,989

modified Jul 2 at 8:10

-3 votes

1 answer

101 views

Noether's theorem by a taste of logic [closed]

paulina

1,679

modified 23 hours ago

3 votes

3 answers

70 views

Why the $T_1$ recovery & $T_2$ decay are independent?

Dr. Nate

420

answered Jul 2 at 11:20

-1 votes

1 answer

107 views

Why the Sun has a higher temperature than humans?

Qmechanic♦

206k

modified 2 days ago

2 votes

2 answers

133 views

QFT introduction: From point mechanics to the continuum

Ján Lalinský

38.7k

modified yesterday

2 votes

2 answers

100 views

Given a representation $(n, m)$ of the Lorentz group, is the little group representation just the tensor product $n \otimes m$?

Qmechanic♦

206k

modified 5 hours ago

3 votes

1 answer

128 views

Proportionality of Pressure and Temperature in defining Absolute Temperature scale

naturallyInconsistent

9,259

answered 2 days ago

-2 votes

2 answers

126 views

How can rotation about Z be a superposition of rotations in X ($|\uparrow \rangle_z = |\uparrow\rangle_x + |\downarrow\rangle _x $) [closed]

ZeroTheHero

45.9k

modified Jun 30 at 20:53

-2 votes

5 answers

204 views

Why is my idea of voltage drop wrong?

my2cts

25.2k

modified yesterday

3 votes

1 answer

91 views

Different Bekenstein bound equations – what’s the difference?

Níckolas Alves

22k

modified Jun 28 at 20:15

0 votes

1 answer

52 views

Length Contraction: is $t'$ or $t = 0$?

Qmechanic♦

206k

modified 2 days ago

0 votes

2 answers

84 views

Heisenberg's uncertainty principle for eigenfunctions of one of the observables

ZeroTheHero

45.9k

answered yesterday

6 votes

2 answers

99 views

Why Cepheids have Period Luminosity relation?

Cleonis

21.3k

modified 8 hours ago

1 vote

1 answer

127 views

Are states partially ordered in the same way via entanglement and Bell violations?

Norbert Schuch

20.8k

modified Jul 1 at 9:18

3 votes

1 answer

125 views

Joint measurability in quantum mechanics

Valter Moretti

73.3k

modified Jul 1 at 18:05

2 votes

1 answer

97 views

Solid-on-solid models

Yvan Velenik

10.4k

modified Jul 2 at 14:36

-3 votes

3 answers

73 views

Does Matter Cause Curvature or Vice-Versa [closed]

paulina

1,679

modified Jun 29 at 16:14

3 votes

1 answer

91 views

Adiabatic Approximation in the spin 1/2 System

Jos Bergervoet

4,574

modified yesterday

0 votes

3 answers

54 views

Significant figures when product is more by a factor of 10

Farcher

97.7k

modified Jun 29 at 21:59

2 votes

1 answer

83 views

Why is the mass-energy graph for atomic mass $A=98$ not quadratic?

Qmechanic♦

206k

modified 11 hours ago

3 votes

3 answers

167 views

Photonic black holes

RC_23

9,353

modified 2 days ago

1 vote

1 answer

96 views

Can the Parity Operator in polar coordinates be defined as $\hat\Pi\psi(r,\theta,\phi) = \psi(r,\theta+\pi,\phi).$?

Tobias Fünke

7,989

modified yesterday

3 votes

3 answers

96 views

How can the stress-energy tensor $T^{μν}$ be unique when the Lagrangian $L$ is not?

Ján Lalinský

38.7k

answered Jul 2 at 16:12

-3 votes

1 answer

74 views

Strange calculus involved in work and power [closed]

Prahar

26.5k

modified Jun 29 at 17:28

-1 votes

2 answers

120 views

Is it possible there can be a non-Fourier model of string vibration? Is there an exact solution?

Terence Allen

7

modified Jun 29 at 15:40

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