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1 vote
1 answer
15 views

Supersymmetric Hamiltonian for particle on a line with internal degrees of freedom

1 vote
1 answer
31 views

Origin of energy stored in an electric field

0 votes
1 answer
16 views

Apparent pressure difference between two points at same elevation in a siphon

3 votes
1 answer
44 views

Infinitely many conserved currents in an (1+1)D free QFT

0 votes
0 answers
50 views

Does gravitational information travel through a black hole or around a black hole?

-2 votes
0 answers
27 views

Path integral formulation for selective paths in an energy shell $\delta(H(x,t)-E)$

5 votes
1 answer
198 views

Does the value of the gravitational constant change due to dark matter?

12 votes
1 answer
547 views

Why does a mosquito net block the breeze?

12 votes
5 answers
1k views

Is white light a bunch of photons or a messy electromagnetic wave or both?

1 vote
0 answers
55 views

Problem book in quantum mechanics [duplicate]

0 votes
1 answer
50 views

Why integral curves of a null vector must be null geodesics?

3 votes
2 answers
91 views

Statistical mechanics and the distribution of phases of oscillation

0 votes
2 answers
71 views

Is mass a representation of the amount of energy, or is it just another form of it?

0 votes
1 answer
65 views

How to solve for orbital path from velocity vector and starting pos?

17 votes
10 answers
4k views

How do we know what's IDEAL if we have never seen it?

0 votes
0 answers
53 views

Why are exponential factors dimensionless? [duplicate]

2 votes
0 answers
47 views

Is there a relationship between the contact points and coefficient of kinetic friction I am not aware of? [closed]

1 vote
1 answer
27 views

Fluid drag and fluctuation-dissipation relation

4 votes
2 answers
361 views

Drag caused by Unruh effect

0 votes
0 answers
19 views

What is the relationship between rolling resistance force and road slope? [closed]

1 vote
0 answers
25 views

Time of flight to energy conversion (Jacobian) [duplicate]

2 votes
0 answers
93 views

Huang's derivation of the grand canonical ensemble [closed]

0 votes
1 answer
94 views

What happens when generators act on wave functions?

1 vote
0 answers
26 views

Explicit FLRW Killing vector fields

12 votes
7 answers
4k views

Where is potential energy stored in a human body?

13 votes
1 answer
631 views

Is there a rigorous equivalence between the ball-on-hemisphere and falling rod problems?

1 vote
0 answers
29 views

What is the relation between the polarization $\mathbf{P}$ and the electric field $\mathbf{E}$ in piezoelectric and flexoelectric materials?

5 votes
1 answer
397 views

Interpreting Curved Spacetime

-2 votes
0 answers
22 views

Series and parallel resistance problem [duplicate]

-1 votes
0 answers
36 views

Derivation of gravitational redshift by Schutz

-1 votes
0 answers
42 views

What should I do to understand Physics from scratch? [closed]

9 votes
7 answers
539 views

Can we "pick up" an absolutely smooth cone off the ground? [closed]

0 votes
0 answers
51 views

Noether theorem and conservation of charge

0 votes
0 answers
45 views

Classical field theory in terms of the first jet bundle

6 votes
1 answer
68 views

Soft graviton theorem and derivatives of the dirac $\delta$ function with respect to the hard momenta

4 votes
1 answer
174 views

Angular acceleration about different axes

0 votes
0 answers
28 views

Why do speed of different colours of light vary in glass but are the same in vacuum? [duplicate]

0 votes
1 answer
35 views

What is the maximal width of an antinode on a string? [closed]

0 votes
2 answers
131 views

How can water with a very tiny change in density increase the pressure so much?

-1 votes
4 answers
375 views

When the frequency ceases to exist

-1 votes
1 answer
41 views

Is energy stored in pure thermal energy, or in temperature gradients? [closed]

2 votes
1 answer
99 views

Why can we shift the renormalization scale in the RG flow?

1 vote
2 answers
97 views

Does our universe have a "true" cosmological constant?

6 votes
2 answers
690 views

In quantum mechanics, why is the perturbed state orthogonal to the unperturbed state?

3 votes
1 answer
423 views

The problem of the perfectly horizontal string

2 votes
1 answer
69 views

Why does an angular velocity vector have an "expressed-in" frame?


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