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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.
Feb
2
comment What is the electrical potential at point A, 15.4 cm from the center of the charge?
I've deleted nearly all of a pointless comment thread. I'll note that negative remarks about another user's character are generally are in violation of the "Be nice." policy.
Feb
2
revised What is the electrical potential at point A, 15.4 cm from the center of the charge?
rolled back to a previous revision
Feb
2
comment Best planets profile for a tattpp of the solar system
There is no one orientation in space where the alignment can happen (the solar system is no an orrery), and worse some of the planets have precessing axes, so there is no single answer to this question.
Feb
2
comment Faster alternative to travel to any location in the west?
Yes, the idea is deeply flawed. Whatever motive power is being used to arrange "standing still" (and it takes some any way you look at it) could be used to get you there). Various science fiction authors have proposed variation on what Heinlein calls "semi-ballistics" (which differ from the ICBMs that @CuriousOne mentions mostly in being able to come to a smooth landing) which is the right way to handle the situation. But the people proposing commercial space craft don't think they'll pay as travel yet.
Feb
1
comment Why is Bohr's explanation called Bohr's model and not Bohr's theory?
It's not a theory because it has very little explanatory power, and was junked less than 15 years after being proposed. See physics.stackexchange.com/q/89351 and physics.stackexchange.com/q/114341. It persists as a teaching model for a number of reasons but there is a bit of a movement to do away with the emphasis that has historically but put on the developmental quantum thinking in teaching modern physics (in favor of starting with correct models from the get go).
Feb
1
revised Possible confusion, the inertia of something yields a tensor? (trying to understand an example)
added 2 characters in body
Feb
1
revised Possible confusion, the inertia of something yields a tensor? (trying to understand an example)
minor blue pencil stuff
Feb
1
revised Possible confusion, the inertia of something yields a tensor? (trying to understand an example)
added 1 character in body
Feb
1
answered Possible confusion, the inertia of something yields a tensor? (trying to understand an example)
Feb
1
comment What will happen if we collide electron with any quark?
"Is this collision possible?" Happens all the time at facilities like JLAB (and the planned electron-ion collider). It's one way to study nucleon sub-structure. But if you "don't know about energy scales" then this question is unreasonable broad. Many of the same sorts of things are possible as in hadroic cases, but the signals are usually purer.
Feb
1
comment How to be an active undergraduate physics student?
Go to class, join the physics club or SPS, participate in any out-of-class activities you can reasonable make, talk to your advisor about getting more involved, join or form a study group with some peers, and so on. Basically you become active by being active. In your first year your choices for diving into advanced work are going to be, well, limited. So make sure you are about the place and the professors notice that you are a physics student.
Feb
1
comment How to be an active undergraduate physics student?
I'm voting to close this question as off-topic because it's a social question about university and not about physics.
Feb
1
comment How does Loop Quantum Gravity describe particles?
Surely you should edit your earlier question on the same subject rather than re-positing, no?
Feb
1
comment Does this count as a proper derivation of the formula for work and kinetic energy?
This has much in common with the usual algebra-based approach, my only critique would be that the focus is on symbol manipulation instead of talking about the meaning of what you're doing (and that's a style issue rather than something fundamental). "Serious" treatments use calculus, because it makes it explicit that you don't need periods of constant acceleration, but again that's a nitpick.
Feb
1
comment How do radio antennas follow electrical rules
"However current requires a complete circuit to 'flow'." Is only true over sufficiently long time scales. The antenna works with inputs that are fast compared to the time scale over which that rule applies to it. You can't treat it as a circuit in the sense that you do "circuits" in a introductory course. (The time scales thing even trips experts working in domains they're not used to, BTW. There are special rules at very high frequencies that other EE's stumble on all the time.)