Experimental nuclear and particle physicist. These days I'm teaching, but I've spent a lot of time on nucleon structure in fixed target electron scattering and neutrino oscillations using reactors and beam sources.

8h
comment Underdetermined forces in a statics problem
@BenCrowell Dude, making me think when I'm trying to prepare lecture slides... but I think you're right.
11h
comment A new interpretation of QM
Here's the rub: Physics SE is not a discussion site. We deal in questions that have correct and well understood answers (or at most a few good bets). Open ended discussion is strongly discouraged. I think @HDE226868 is too strong in invoking "non-mainstream"-ness, but there is no way to ask "Hey guys whats your opinion of my new theory?" even if you got it published in Nature.
13h
comment Underdetermined forces in a statics problem
I'd echo Ben that you don't need to apologize--the reason for the lack of downvotes is (presumably) that people see this as (1) correct as far as it goes and (2) a genuine attempt to help. But it is unlikely to attract much positive attention either.
13h
comment Would using Cherenkov radiation for lighting be feasible?
@CuriousOne That depends. For instance the Cerenkov glow from a water-moderated, fission reactor is not a sign of danger because by design the moderator absorbs essentially all the dose. And it's pretty.
15h
comment Underdetermined forces in a statics problem
I do think that you would have to be very careful in setting up an actual experiment to get the assumption of symmetry to hold. Even a small deviation will break the symmetry and make the system determined again.
15h
comment Underdetermined forces in a statics problem
For a different class of underdetermined problems (a object supported at four points in a rectangular grid) you can convince yourself that when you stop neglecting elastic deformation you can "fix" the system (at the cost of making it a larger system). It's not obvious to me if that is the case here.
16h
comment Underdetermined forces in a statics problem
Hmmm ... the OP here is a professor of physics. He knows that and has asked a rather deeper question than the one you understood.
16h
answered Would using Cherenkov radiation for lighting be feasible?
17h
comment Reconciling Units in Classical System Analogies: Why Does Torque Have Units of Energy?
@garyp I suppose that's a matter of interpretation. As far as I'm concern you can't add a torque to an energy so they are not the same no matter that you write the units as mass*distance^2/time^2 in each case. In other words, I'm including the identification of the mathematical class in the units because both are about identifying what sort of critter you're talking about.
17h
comment Reconciling Units in Classical System Analogies: Why Does Torque Have Units of Energy?
In that case you want the answer to 37881 that talks about $dW = \tau \cdot d\theta$ implying that torque is in Joules per radian.
17h
comment Reconciling Units in Classical System Analogies: Why Does Torque Have Units of Energy?
physics.stackexchange.com/q/37881 Short-short version the cross-product develops a different kind of entity than the dot-product so they are not the same units at all.
17h
comment Magnetic field of magnetic screwdriver?
It is actually surprisingly difficult to generate reliable and consistent strength in permanent magnets, so for most purposes people don't try. They just set some minimum operation test (...picks up a 1 gram test object from 5 mm distance...) to use for quality control and leave it at that. They may very well not know the field strength, and that doesn't bother them. If you care get (or build, they're pretty simple) a Hall probe and measure it as best you can.
17h
comment What does this community mean by students?
As to tension: it is a constraint force; it is an expression of the resistance of a solid materials to stretching in response to a applied force; it is the pulling counterpart to the normal force (solids resisting interpenetration due to pushes); it always points along the line of the string or rope and has the same magnitude on the whole length of any segment not subject to longitudinal forces.
17h
comment What does this community mean by students?
This post may direct renewed attention to your question, and the high rep users may (or may not) like the current version enough to re-open it. Of course you are better off understanding what is going on with tension than trying to recall a catalog of formulas. But until a fairly late edit it was totally unclear what your question really was.
18h
comment Why no reputation for good comment?
The valuable material from comments of that kind should be edited into posts to insure that it is preserved. Comments exist for exactly one reason: to allow side discussion that lead to improved posts. Other kinds of side discussion happen (quite a lot on Physics SE) but they are living on borrowed time.
18h
revised What does this community mean by students?
deleted 4 characters in body
18h
answered What does this community mean by students?
1d
comment Can a box on a frictionless rotating table rotate?
Who told you it was started by the motion of the table? I could have walked by and given it a thwack with a mallet while you were out of the notional room? It is a homework exercise that takes place in the Physics 101 frictionless vacuum full of massless, rigid objects: it's doesn't have to make all possible kinds of sense.
1d
comment Scintillator Length Calculations
"so is my reasoning correct when I assume that I'm supposed to get my $constants * int(ta∗e−bt)=0.98$ ?" That's right. But there is no loop in the answer Wolfram gives and more than an integral that gives you $\sin (3x + 2)$ has gotten you into a "trig-loop". You just need the inverse function. Or numerical solutions are fine for this job. I'm afraid that as you move your colleagues will simply assume that you can find a solution to things like this without aid. That's why the sources don't mention it.
1d
comment Scintillator Length Calculations
Wolfram alpha gives answers mostly in Gamma-function forms. But in all seriousness there is no reason you need an exact solution. Use a numeric integration.
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