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23h
comment How useful is programming in physics?
1 GB/s of Data? I don't know which detectors you worked on...but CMS produces ~40TB/s several orders of magnitude greater... Maybe you mean the data after the High Level Triggers, but that ~40TB/s doesn't get processed down to ~100MB/s on its own!
Oct
9
comment How fast is the matter and antimatter reaction compared to nuclear chain reaction?
@annav It seems like you would gain more insight from researching Protonium. One reason for the (relative) stability is that the orbiting pair needs to lose a large amount of energy before the two come into the range of the strong nuclear force.
Sep
15
comment How does an electron move around in an orbital? Is it “wave-like” or random?
Confusingly enough, you can however take a picture of the little ball in there, with a definite position. Even though there is not little ball moving around... However, when you do that, the little ball is no longer "in" the orbital.
Sep
12
comment Quantum mechanics threshold
@BMS Can't help but notice that the answers in the question you linked to does not include Neutron stars, which are quite big.
Sep
11
comment Is this scene from the A Team explainable by Physics?
-1 Order of magnitude issue with muzzle velocity. Also, why complicate a simple delta-v calculation with all these numbers. Just apply the rocket equation.
Aug
22
comment Energy of an Electron in a One Dimensional Periodic Potential
The last step is the actual integration. Given the form of the transformed wavefunction, each k value forms an orthogonal basis.
Aug
22
comment Energy of an Electron in a One Dimensional Periodic Potential
Of course the Fourier Transform of a periodic function reduces to Fourier Analysis, with integer values of k, coraspond to Eigenfunctions.
Aug
22
comment Energy of an Electron in a One Dimensional Periodic Potential
The introduction of $/exp(ik)$ I suspect is there to lead you to a Fourier transform.
Aug
21
comment Energy of an Electron in a One Dimensional Periodic Potential
Have you considered solving this problem in k space?
Aug
19
comment Splitting of degenerate energy levels with a perturbed particle in a box
Why don't you apply perturbation theory? You know how to solve for the Eigen values and functions for $E = 0$. Just perturb the equation to the number of terms you need.
Aug
19
comment Are there Higgs bosons in the Sun?
The equations you give are only valid in the high energy approximation. In the low energy we need to factor in $\Delta E\Delta t \geq \hbar / 2$
Aug
19
comment Are there Higgs bosons in the Sun?
@SteveJessop 'The weasel-word is "significant numbers"'. Surely you mean the "weasel-word" is "real" as opposed to "virtual". I would say there are a significant enough number of them to give the sun mass.
Aug
17
comment Can you run away from your shadow?
@HDE226868 what if the shadow falls into Event Horizon?
Aug
15
comment Put a bullet into orbit around the moon
Ah crap. You are right. The period i was confused with is tidal period.
Aug
14
comment Put a bullet into orbit around the moon
Yes it does en.wikipedia.org/wiki/Tidal_locking#The_Moon Strickly speaking it is slightly faster, because of the orbit of the mun.
Aug
14
comment How much electricity can be produced by my thermoelectric generator?
"thermoelectric generator". All Engines work by using a hot and cold heat sink. You will probably get the best possible efficiency using Stirling Engine attached to a standard alternator. However, 34K/300K ~ 10%(approximately maximum efficiency not possible) the is hardly anything.
Aug
14
comment Can you run away from your shadow?
Does an Event Horizon count as a shadow? en.wikipedia.org/wiki/…
Aug
14
comment Put a bullet into orbit around the moon
@Aristocrates my bad...my Kerbals confused Apoapsis with Periapsis. I meant to place the Periapsis on the surface of the mun at the diametric opposite side of the mun.
Aug
14
comment Put a bullet into orbit around the moon
My Kerbals tell me that the Mun rotates once every 24 hours and that, from the rotating frame of reference that is the surface of the mun, a gun being fired east to west would have a different orbit than a gun fired west to east.
Aug
14
comment Put a bullet into orbit around the moon
My Kerbals tell me that your numbers are only correct for a polar orbit.