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mike stone
  • Member for 7 years, 1 month
  • Last seen this week
  • University of Illinois
80 votes
Accepted

Why does rainwater form moving waves on the ground? Is there a name for this effect?

71 votes
Accepted

Why does a body always rotate about its center of mass?

69 votes
Accepted

Why doesn't a mercury thermometer follow the rules of volume dilatation?

54 votes

Can a battleship float in a tiny amount of water?

53 votes

What is a joule? I find the definition confusing

30 votes

Why do physicists use the Bra and Ket notation when mathematicians tend not to?

29 votes

Triviality of interacting QFT

28 votes
Accepted

Why does it take so long for a gas to reach a thermal equilibrium?

25 votes

Must observables be Hermitian only because we want real eigenvalues, or is more to that?

24 votes

Why is the mechanical advantage 8 and not 4 in this pulley system?

21 votes

Why do images not appear inverted when looking directly through a pinhole camera?

20 votes
Accepted

Is the right hand rule a trick to avoid tensors?

20 votes
Accepted

Lorentz invariance of Maxwell's equations in matter

19 votes

Approximating an expression for a potential

19 votes

Non-unique zero function in the function space (Hilbert space)

19 votes
Accepted

If frequency of photons is a continuous spectrum, wouldn't the chance of a photon having the exact right frequency to excite an electron be zero?

15 votes
Accepted

Misunderstanding of the magnetic field

15 votes

Is continuity of the wavefunction "put in by hand" for the Dirac delta potentials?

14 votes

Are the speed of sound and water ripples' speed the same?

14 votes

Can you make a laser without cavity, if you have a pump strong enough? I think no, but is my reasoning correct?

13 votes
Accepted

Can a Hermitian operator $A$ bring a wavefunction $|\psi \rangle$ out of Hilbert space?

12 votes

Complex conjugate and transpose "with respect to a basis"

12 votes

Green's function on torus

12 votes
Accepted

Chirality of the Electromagnetic Field Tensor

12 votes

How can Cooper pairs form in zero temperature, if there are no phonons?

12 votes

Do spinors form a vector space?

12 votes

Do elementary particles at rest produce magnetic fields?

12 votes

Can sound waves deform (curl brake) like water waves?

11 votes

If a person drops a briefcase in an elevator and it does not fall to the floor, what is the elevator's aceleration?

11 votes

Are eigenfunctions of $E$ also eigenfunctions of $p$?

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