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mike stone

University of Illinois

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82
Why does rainwater form moving waves on the ground? Is there a name for this effect?
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76
Why does a body always rotate about its center of mass?
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69
Why doesn't a mercury thermometer follow the rules of volume dilatation?
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62
Rotate an object about the time axis
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55
Can a battleship float in a tiny amount of water?
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53
What is a joule? I find the definition confusing
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31
Why do physicists use the Bra and Ket notation when mathematicians tend not to?
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30
Triviality of interacting QFT
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29
Why does it take so long for a gas to reach a thermal equilibrium?
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26
Must observables be Hermitian only because we want real eigenvalues, or is more to that?
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24
Why is the mechanical advantage 8 and not 4 in this pulley system?
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22
Is the right hand rule a trick to avoid tensors?
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21
Why do images not appear inverted when looking directly through a pinhole camera?
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21
Why haven't we found thermal superconductors?
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20
Approximating an expression for a potential
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20
Lorentz invariance of Maxwell's equations in matter
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20
Non-unique zero function in the function space (Hilbert space)
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19
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?
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15
Misunderstanding of the magnetic field
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15
Why isn't the moment of inertia of a cylindrical tube the difference of those of two cylinders?
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15
Is continuity of the wavefunction "put in by hand" for the Dirac delta potentials?
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14
WHY can't we use conservation of energy to find speed of the earth around the sun?
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14
How does a linear operator act on a bra?
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14
Can you make a laser without cavity, if you have a pump strong enough? I think no, but is my reasoning correct?
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14
Are the speed of sound and water ripples' speed the same?
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13
Quantum harmonic oscillators with momentum-position coupling
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13
Do elementary particles at rest produce magnetic fields?
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13
Do spinors form a vector space?
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13
Can a Hermitian operator $A$ bring a wavefunction $|\psi \rangle$ out of Hilbert space?
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13
Eigenstates of QM harmonic oscillator in momentum space
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