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Feb
6
comment If you play more than one music track at once on a computer, does the sound heard get louder?
In a lot of ways this is a technology question rather than a physics one. Some might argue that because the sound system is designed correctly you can treat it as two physical sounds sources and analyze it on that basis, but the reliance on design doesn't make me (personally) happy.
Feb
5
comment How to determine likelihood of baryon decay
By "probability" do you mean the branching ratio or something else? Also the expression involving $J^{PC}$s is pretty messed up. Maybe you could clarify that. Note that enclosing math in pairs of double-dollar-signs $$ will get block-set equations.
Feb
4
comment Cherenkov radiation can it happen in a jar using tap water with 8 thorium laced lantern mantles as a radiation source
The vitreous humor generates Cerenkov radiation every time a cosmic muon passes through the eyeball itself. Alas, given the size of the eye, the middling QE of the light sensitive pigments and the need for multiple nearby hits to register consciously, the vast majority will never register. To try it, go far enough into a shallow cave to find complete darkness, wait for adaption, lay on your back. Depending on depth you might expect as many as 1 cosmic muon with good geometry in each eye every 20 seconds or so. But I think that you will register only a few percent at best and without color.
Feb
4
comment Cherenkov radiation can it happen in a jar using tap water with 8 thorium laced lantern mantles as a radiation source
The easy way to see Cerenkov radiation with the unaided eye is to locate the nearest university with a "test reactor" and try to arrange a tour. Such reactors used to be quite common in US, but have grown a little more sparse in the last few decades. I conjecture that there are some to be found in other countries that use nuclear power as well. Getting a tour can be anywhere from as simple as asking up to fairly difficult without an on-going relationship.
Feb
3
comment Cold Fusion and Black Holes
Please do not use comments to disparage other users even by implication.
Feb
3
answered Why is amorphous classified solid?
Feb
3
comment Doesn't the success of statistical physics seem somewhat unreasonable?
@Timsey My point is that it does affect physics. For that matter it's a key ingredient in making chemistry happen. The Liouville theorem and the ergodic hypothesis are tools for booting this quantum understanding to classical systems without have to fully understand the rules of decoherence, but at the lowest level the inability to tell if that is electron 1 over there while electron 2 is here or vice versa is a core property of physics.
Feb
3
comment Doesn't the success of statistical physics seem somewhat unreasonable?
Note that distinguishability (or lack thereof) is a thing that can be checked experimentally for fermions. It's not a matter of "knowledge about the system", but a real consequence of quantum mechanics.
Feb
3
comment How do modern particle detectors identify and segregate different particles
Couple of related links from around the site: physics.stackexchange.com/questions/206648/… physics.stackexchange.com/questions/34193/… . We don't seem to have a general PID question yet. But then, the completely general answer is book-length.
Feb
3
comment How do modern particle detectors identify and segregate different particles
To help you search, the problem goes by the name "particle identification" or "PID" in the shortest form (you also see "particle ID"). Note "PID" can also mean "proportional, integral, differential" when used in control systems, so it's value as a search term is dilluted.
Feb
2
comment What physics does the Super Proton Proton Collider intend to explore in the $\lesssim 100\:\mathrm{TeV}$ range?
So .... is it a electron-positron machine or a proton-proton machine?
Feb
2
comment Sustained nuclear criticality in liquid vortex
You're going to have a hard time keeping the solution at low temperature in the presence of a on-going critical reaction...
Feb
2
comment Big Bang Quarks Travelling at Light Speed
@MitchellPorter Thus "from a strict point of view" and "in a way that satisfies the license" which is a surprisingly high hurdle leading to the recent consideration of adopting a different license for code snippets (see also several following threads on the mother meta. What Jen has done is casual and more or less works as long as (a) the comment above is left and (b) this content isn't copied elsewhere. But neither of those things is guaranteed.
Feb
2
comment What will be final velocity of three charges $q$, $q$, $2q$?
I take back the previous comment. The constraint is absolutely critical in this, and if you are going to use any kind of conservation it tells you things not clearly specified in the problem statement. This may be a very cute (i.e. deeply evil) exercise.
Feb
2
comment Please help me with this doubt from thermodynamics
That answer is correct. The emissivity is also the absorbtion coefficient. It has to be by time-reversal, and it is so experimentally.
Feb
2
revised Why do dark objects emit more than lighter ones?
speling
Feb
2
comment Please help me with this doubt from thermodynamics
This may be a duplicate of physics.stackexchange.com/q/127586.
Feb
2
comment Monte Carlo Metropolis method - trial step algorithm
BTW--do you know about Computational Science? Not that this is off-topic here under current rules, but you'll find a higher density of experts over there. I can migrate it if you ask.
Feb
2
comment Monte Carlo Metropolis method - trial step algorithm
So parameterize the step size and anneal: start large and slowly squeeze it down. Gives you a chance to learn if you've missed a golden spot but still end with a well defined answer. You can also average over multiple walkers to improve the odds of a good overall map. There are lots of variations.
Feb
2
comment Monte Carlo Metropolis method - trial step algorithm
An important question to ask yourself is "Do you want to map the whole space, or to converge on a single answer?" And if you want one (or a small number of) answer(s) you have consider how scared you are of ending in sub-optimal local extrema and if you want any annealing.