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mike stone's user avatar
mike stone's user avatar
mike stone's user avatar
mike stone
  • Member for 9 years, 2 months
  • Last seen this week
  • University of Illinois
82 votes
Accepted

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

76 votes
Accepted

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

70 votes
Accepted

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

62 votes
Accepted

Rotate an object about the time axis

55 votes

Can a battleship float in a tiny amount of water?

53 votes

What is a joule? I find the definition confusing

32 votes

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

30 votes

Triviality of interacting QFT

29 votes
Accepted

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

27 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?

22 votes
Accepted

Why haven't we found thermal superconductors?

20 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

20 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?

18 votes

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

17 votes
Accepted

How does a linear operator act on a bra?

15 votes

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

15 votes
Accepted

Why isn't the moment of inertia of a cylindrical tube the difference of those of two cylinders?

14 votes

WHY can't we use conservation of energy to find speed of the earth around the sun?

14 votes

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

14 votes
Accepted

Eigenstates of QM harmonic oscillator in momentum space

14 votes

Quantum harmonic oscillators with momentum-position coupling

14 votes
Accepted

Misunderstanding of the magnetic field

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?

13 votes

Do elementary particles at rest produce magnetic fields?

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