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May
6
comment Vibrating Objects
Have you considered, for example, a loudspeaker and audio amplifier?
May
6
comment Vibrating Objects
Extremely quickly is not precise. Do you have a particular frequency (range) in mind?
May
2
comment Could the 4 Forces Split Off or “Decay” into Other Forces in the Distant Future?
Related: Vacuum decay
May
1
comment Colliding black holes to an outside observer
What does a binary black hole merger look like?
Apr
30
answered Is current in superconductors infinite? If they have 0 resistance then I (V/R) should be infinite?
Apr
30
comment Why don't protons just bounce off each other in the LHC?
This answer might be helpful.
Apr
22
comment Voltmeters and changing magnetic fields
This is a standard problem to illustrate why, in ideal circuit theory, it is assumed that there are no changing magnetic fields threading the circuit. Since there is a changing magnetic field threading this circuit, the voltage between two points is path dependent. Related: physics.stackexchange.com/q/30446/9887
Apr
22
comment Circuit with inductor
You say that you're lost conceptually but that doesn't tell us much so, let me ask you, would you know how to solve the circuit if R1 and R2 were removed? If not, then consult any of the ubiquitous online tutorials or textbooks and learn how to solve the series RL circuit first. If so, then are your familiar with Thevenin equivalent circuits?
Apr
22
comment Why is probabilty conserved under time evolution of a system in quantum mechanics?
Since you've stated that you've found no fully satisfactory answer, it would be appropriate, I think, for you to precisely identify in your question what isn't satisfactory so those here that wish to answer your question will not have to guess at what doesn't satisfy you.
Apr
19
answered Does elementary particle emit photon?
Apr
18
comment How do you derive the Dirac equation for momentum space?
+1 for using "almost everywhere" (and, heck, it's Friday night).
Apr
17
comment Probability of finding particle in infinite square well, displaced walls
@Alexander, yes you know the new energy eigenfunctions and you know the wavefunction (immediately after the change) so the probability amplitude of finding the system in one of the new energy eigenfunctions is given by the inner product of the wavefunction and that energy eigenfunction. This is elementary QM. en.wikipedia.org/wiki/…
Apr
17
comment Probability of finding particle in infinite square well, displaced walls
@Alexander, in your question you asked "How do you calculate the probability of measuring the two lowest excited states after this instantaneous displacement." So, you know the wavefunction of the system just after the change, and you know (or ought to know) the energy eigenfunctions after the change. This is all you need to answer the quoted question.
Apr
17
answered Probability of finding particle in infinite square well, displaced walls
Apr
17
answered Why isn't the terminal velocity completely achieved but only asymptotically achieved due to action of resistive force?
Apr
17
awarded  Nice Answer
Apr
17
comment Ratio of two RMS values in recorded audio
This question would certainly be at home at the EE site: electronics.stackexchange.com
Apr
17
answered Why is charge of the electron negative?
Apr
16
comment How GR, QFT, or string theory address the one-directional feature of time?
Curio, I'm curious. Clearly, there is much information 'out there' and accessible on the arrow of time issue and, I strongly suspect, you're aware of this and it is likely you're familiar with the literature. So, I'm wondering what it is that you're hoping, in fact, to find here?
Apr
16
comment Is it possible that Mercury collided with Earth, thus creating the Moon?
This is just pedantic aside FWIW. Keep in mind that, in the case of a giant impact scenario, what we call the Earth and the Moon are the result of the collision. The objects that collided to form the Earth and the Moon did not include the Earth.