Questions tagged [soft-question]

Questions that ask about some aspect of physics research or study which doesn't involve the actual physics. In general, soft questions can be answered without using physical reasoning.

77 questions with no upvoted or accepted answers
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Physical Theories and Statistics (operationalism?)

I am under the impression that there must be a duality between physical theories and statistical models that have no reference to physical theories. For instance, given an apparatus, a researcher can ...
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66 views

Mathematically equivalent physical systems

This seems a bit different than the typical question here, but I'm not sure where to ask. Is there a name or field of studying mathematically equivalent systems? The simplest example I can think of ...
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2answers
64 views

Transmural pressure

Transmural pressure I want to ask about transmural pressure. For example, if the pressure outside a balloon increases, the volume decreases, and if the pressure decreases, the volume goes up. But ...
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1answer
211 views

Programs trying unifying QM and GR instead of QFT and GR?

Is there any program which attempts at unifying quantum mechanics and gravity rather than unifying quantum field theory and gravity? Motivation We use the heisenberg picture to define velocity $\hat ...
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54 views

Causal networks and “local” entanglement

On his Opus Maximus, a new kind of Science, Stephen Wolfram suggests that causal networks can create behaviour similar to entanglement because the local structure of space is only an averaged ...
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303 views

Does the analogous saying: “matter is essentially 'condensed' energy” have any merit?

Einstein in his derivation of special relativity came upon the equivalence of energy and matter, and given the right circumstances, the relation can go either way - matter can become energy, and ...
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66 views

Why is Bohr's explanation called Bohr's model and not Bohr's theory?

I have seen an answer which tells the difference between model (specific) and a theory (general). And it makes sense 'coz Bohr explained it for the hydrogen atom only. But did he not make a set of ...
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27 views

Hiccup in frequency domain

Main question: What would the Fourier transform of hiccup look like? This question is too general so let me elaborate a few possible approaches. Hiccup just as a series of pulses (of no matter what ...
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123 views

Is this a good explanation of electron mobility to the layman?

I'm writing an informative paper on graphene for my writing class (layman-oriented), and was describing electron mobility in very simplified terms. Let me know if anything is mistaken, badly ...
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78 views

When doing E&M problems, I find the extreme exponents annoying. Could redefining the coulomb change this?

When typing into my calculator things like $9\space 10^9$ or $8.85419\space 10^{-12}$ its rather annoying to write in all those exponents (yeah I know it sounds dumb), but its much nicer to do ...
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585 views

Exercises with solutions in dimensional analysis - reference request

I am currently trying to brush up on my skills in dimensional analysis, and computing with units. Is there a good source of worked examples, and exercises with solutions? I'd prefer to have solutions ...
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371 views

What is the meaning of symbols $\delta f$ and $\delta^2f$?

Professor was using these symbols to derive the continuity equation. He defined the infinitesimal mass as $\delta^2m=\rho \delta V$ and the mass that leaves some closed boundary $\partial V$ as $\...
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39 views

Are there computerized ontologies for Relativity and (Experimental) Physics? How to contribute?

As machines and automation can generally assist humanity in physical activities, and even exceed mere human capabilities, so, increasingly, also in tasks of reasoning. A basic component of the latter ...
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67 views

Correction of arrow of particle direction

I have seen a stamp of Richard Feynman where Feynman hold the famous Feynman diagram. But is there any problem of the direction of arrow?
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87 views

Intuitive model to show difference between photon energy and light intensity?

What would be a good (intuitive, easily comprehensible) model to explain the quantum nature of light insofar as there is a fundamental difference between intensity and photon energy? One example (not ...
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44 views

Relativistic non-linear Walecka model

What is meant by a relativistic non-linear Walecka model? What are some various sources to study it? [And why cannot Google show a satisfactory result to such a simple question?]
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608 views

Coupled Oscillation Simulation

I'm looking for an online coupled oscillation simulation. The best I have got so far is this --- https://phet.colorado.edu/sims/normal-modes/normal-modes_en.html But I'm looking for something which ...
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116 views

How to move from Special to General Relativity

I have understood special relativity nicely, and right now I am trying to learn general relativity from D'Inverno's book. I an finding it rather difficult to understand the pre-requisite math (i.e. ...
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39 views

Could each non-dependent physical contant represent dimentions, and our universe be a point on this n-dimentional structure?

For example say the gravitation constant instead of equaling G, was actually a range bounded between 0 and infinity. Our Universe would be at a point on this range (equal to our G value) where ...
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31 views

References requested on departments with recitation sessions

What physics departments offer recitation sessions for their physics courses on the undergraduate level? If there is a site which has such info it will be greatly appreciated.
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91 views

Why are there no explicit calculations in some articles

I am always baffled how in all the articles (theoretical ones), there is no explicit calculations, or at least some reference how to find it, or where to find it (the calculation). I get that, for ...
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93 views

Did Planck said that his theory is distinct from Zeno's paradoxes?

I remember once reading that Planck or some other prominent figure in quantum physics said that the theory (probably Planck length or Planck time in particular) is not about the thing what Zeno's ...
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914 views

Starting string theory studies in grad school

How is it possible for a grad student to do research in any modern area of string theory like AdS/CFT or ABJM if they need to start grad school by having to learn QFT from scratch? Is there a time-...
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1answer
40 views

How large would a laser interferometer have to be to detect the flapping of a mosquito's wings?

I understand the most general principle behind LIGO, but I am no physicist so I have no idea how to calculate the amplitude of gravitational waves, much less the length of the lasers required to ...
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269 views

Books aimed at clearing misconceptions for Olympiad Physics?

We are often confronted with the loopholes in our understanding of concepts of Physics when solving problems, especially if they are of high standard like the ones asked in Olympiads. In such cases ...
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1answer
77 views

Is there a way to study mechanics without having to rely on free body diagrams?

For example, consider a very simple situation often used as example in teaching: a horse pulling a stone through a rope attaching them. The analysis goes something like this: There is a force exerted ...
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662 views

How is gravitational force is compared to flow of water?

I listened to a lecture. The professor said that the gravitational field around the particle (spherical in shape) can be compared to a pond having a constant height and depth and water is constantly ...