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1d
comment How to invent mathematics to find solution to real world problems?(without high level mathematical knowledge)
"Can you recommend me a book or course or program(if these exist) that can help me ... to invent mathematics to find solution of that problem?" Honestly, those that would write and sell you such a book or program don't have the answers you seek for, if they did, they wouldn't need (or want) to be writing and selling you books.
2d
comment Is the electrostatic field really static? Does thermal vibrations not affect it?
FWIW, I think the "which in turn generates ..." is more harmful than helpful though YMMV.
2d
comment Is the electrostatic field really static? Does thermal vibrations not affect it?
An 'electrostatic field' that is not static is not an electrostatic field. But an electrostatic field is an (useful, ideal) abstraction for thinking about and solving problems.
2d
comment time as consequence of hadronics
I'm voting to close this 'question' as off-topic because it contains no question marks.
2d
comment Voltmeter across two loops
ghosts, a physical voltmeter has a very high but finite internal resistance so, for there to be a sustained non-zero voltage reading, there must be a sustained non-zero current through. But there is no path for a sustained current.
2d
comment how current flows in a parallel circuit as the potential difference is same?
Consider, for example, a length of superconducting wire with a constant current through.
2d
comment how current flows in a parallel circuit as the potential difference is same?
"Current does not flow from one point to another point if there in zero potential difference" - this is false.
2d
comment Is there a proof that the number of eigenstates is countable for a bound system?
@Timaeus, surely the context is clear; here we're talking about eigensolutions to the TISE. For the harmonic oscillator, there are uncountably infinite eigensolutions but only countably infinite solutions that are square integrable and thus represent physical eigenstates. I don't see the relevance of your superposition observation.
Aug
29
comment Is there a proof that the number of eigenstates is countable for a bound system?
@Timaeus, the point of your comment is unclear to me.
Aug
29
comment Is there a proof that the number of eigenstates is countable for a bound system?
Keep in mind that the Schrodinger equation for the harmonic oscillator has an uncountable infinity of solutions but just countably infinite normalizable solutions. (Come to think of it, the free particle solutions aren't normalizable either).
Aug
27
revised A problem of missing energy when charging a second capacitor
added 1452 characters in body
Aug
27
comment A problem of missing energy when charging a second capacitor
@Lenzuola, let me ask you this - where I wrote "But this ignores the self-inductance of the circuit and the associated electromagnetic effects" in my answer, does this not cover your concern that "an ideal short circuit must be recognized as at best ideal inductor"? Honestly, it's as if Olin and you are choosing to read an error in my answer that's simply not there. But that's beyond my span of control and thus, is of little interest to me.
Aug
27
comment Why the shunt resistor would not protect the ammeter when the ammeter connected in parallel?
Because the ammeter protects the shunt resistor.
Aug
26
comment Current flow between two batteries
An electric circuit consists of at least one closed path through which charge can flow; there is no closed path in either diagram.
Aug
24
revised Why teachers use red ink for checking, why are traffic signals show red for stop?
rolled back to a previous revision
Aug
24
comment Applications of differential equations in physics
Applications of sentence fragments in physics
Aug
24
comment Magnetic Force Confusing Paradox
Related: physics.stackexchange.com/q/108992/9887
Aug
24
comment Magnetic Force Confusing Paradox
Mohammad, the magnetic force on a charged particle is always perpendicular to the particle's velocity so the work done by the magnetic force on a charged particle must be zero. But note that, in the wire, the mobile electrons aren't free to, .e.g., execute circular motion in a uniform electric field, but are constrained by the surface of the wire. Consider the implication of that.
Aug
23
comment Can quarks be considered elementary?
@mhleo, I read the rest of the comment and the first sentence is still analytically false. You're using the word fundamental to mean something other than fundamental (as in primary). This reminds of the sloppy use of the word "Universe" which should be used to mean all there is, was, and ever will be but, evidently, some use it differently. The problem is, if you use the word fundamental to mean what you say, what is the word to use for something that is genuinely fundamental?