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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.

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3answers
45 views

Energy extraction from the layers of sea water?

Could it be possible/reasonable to extract Peltier thermoelectric energy by using a long rod of suitable material that connects the cold bottom of the ocean and the warm surface layer?
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4answers
395 views

Why we can't jump without bending our knees?

I observed it while trying to jump from my bed with my knees straightened and I failed to do it. I want to ask whether it is with all of us our it may be a medical issue with me? Why we can't jump ...
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0answers
50 views

Tensorizing this network

Interested in tensorizing this network (all intersections in the diagram are understood to be tensors). There are $9^2=81$ tensors in the interior and four order nine tensors at the corners of the ...
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0answers
37 views

Why scooters have short wheels? [on hold]

Is there any physics behind the manufacturing of short wheels of scooters or is it just fashion?
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0answers
45 views

How to persuade parents in pursuing theoretical physics? [closed]

I am currently a second year aerospace engineering student, I have realized I do not want to become an engineer, rather, pursue my biggest quest of all time: to become a physicist. Only thing is, ...
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1answer
47 views

Is there a theory on the creation and genesis of fields?

I do not intend to ask theological questions on PSE, so, you can interpret, if you want, this question on a purely physical basis. Almost everywhere, in classical and non-classical physical theories, ...
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0answers
46 views

Physics without forces

Do there exist theories of physics without the concept of force? For, example, even though we sometimes associate repulsion and/or attraction with the concept of force, can all that be explained ...
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2answers
75 views

Science answers “how” and “what” but not “why” [on hold]

I'm a high schooler who naively, for the past few weeks, asked questions that were impossible to answer. I asked "why" questions until I realized that asking "why" questions were the wrong questions ...
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1answer
138 views

Why does the universe require relativity? [closed]

Are there any known compelling reasons why our universe is governed by relativity instead of Newtonian physics? I recognize that an infinite $c$ would be a problem, so I'm not asking about that; I ...
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1answer
81 views

How can tempered distributions be paths?

I'm reading the Appendix A of Glimm and Jaffe book "Quantum Physics: a functional integral point of view", and there is something that I'm missing In section A.4 the authors talk in a very general ...
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0answers
13 views

Which “straight line” should I travel to maximize the number of temperature gradient reversals I experience?

Fire a neutrino from whatever starting point and in whatever direction you like in the universe. As the neutrino travels, it will traverse many temperature gradients in its ambient environment. What ...
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0answers
37 views

Why did Schrödinger write a letter to Einstein “apologizing profusely for his duplicity”? [migrated]

I’m reading “What is Real” by Adam Becker and this is mentioned without any more details. Here is the excerpt. (It’s very possible that it refers to something that was mentioned earlier, which I ...
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0answers
8 views

What to say when making conclusions from experiment that tests a hypothesis?

I recall from inferential statistics, when performing a hypothesis test, that one either “fails to reject the hypothesis” or one “rejects the hypothesis” based on the outcome of the hypothesis test. ...
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1answer
41 views

Entropy, Thermodynamics and Information

This is a bit of a shower-thought, so forgive me if it is ill-conceived or a stupid question! It occurred to me that, to preserve information, you need to use energy. For example, say you have a book ...
2
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0answers
34 views

Do powers of logarithm arise naturally in any physical equation? [closed]

Everything that we learned in the school maths I've come to use at one time or another. Except one thing. Solving equations like this: $$ 1 + \log_2^2 x = \log_2 8x $$ "Where do we use this in real ...
4
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1answer
52 views

Is it beneficial to practice derivations instead of solving problems

During much of my time studying physics on my own time, I have prioritized practicing the derivations out of the book because I feel like I can learn more by trying to master the theoretical structure ...
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1answer
25 views

Intrpretting questions on Fickian diffusion

I am considering the Zimm model for polymer dynamics, and have come across a question Find an expression for the time it takes for the polymer to diffuse a distance equal to its contour length $L=...
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0answers
23 views

Is there a better name for flavour of particles apart from generation number? [closed]

If we assume the standard model falls into 3 generations ordered by mass. (This needn't necessarily be true.) We call these "generation 1", "generation 2" and "generation 3". So the property of a ...
3
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1answer
47 views

Dealing with thermodynamic processes in Statistical Mechanics

I have recently started studying Statistical Mechanics, and through my study of Classical Statistical Mechanics, I have studied how do we write distribution functions for equilibrium systems which can ...
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1answer
37 views

Does charging and discharging a capacitor create very small gravitational waves?

If I understand it correctly, curvature in a region of spacetime is due to concentration of energy and momentum in that region. If I further understand things (I don't) a gravitational wave is a ...
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0answers
16 views

Reference request: Hydrodynamics for transport

Could someone suggest a good book/review that could be used to understand hydrodynamics of conserved quantities for simple systems (say for example to understand energy transport in a chain of ...
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0answers
10 views

English edition of the book by Blondel on Ampere

Is there English language version of the following book which is in French language? A.-M. Ampère et la création de l'électrodynamique, 1820-1827 (Mémoires de la Section des sciences) (French ...
2
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1answer
29 views

Self-regulated stepwise evolution

Are there empirical examples of self-regulated punctuated evolution (with time)? This is when a quantity grows over time in a stepwise fashion, with each growth step having less amplitude than the ...
1
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1answer
66 views

Is there a historical name for an inductor that starts with the letter $L$? (RL circuits) [closed]

Why is a circuit with a resistor and inductor called an RL circuit and not an RI circuit? Was there a now-obsolete name for an inductor that started with the letter $L$?
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1answer
79 views

Is it true that in practice quantum fields are *always* measured by means of coupling to particle detectors?

I'm watching some lectures on Relativistic Quantum Information and in one of them - available here - the instructor is talking about measuring quantum fields. He then says basically that in real ...
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3answers
115 views

Physics breaking down - is it logically consistent? [closed]

I was just reading a sci-fi novel where physics "breaks down". While of course fiction is fiction and I don't expect this to happen in real life, when I tired to contemplate the concept I find that I ...
4
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2answers
126 views

Why coordinate axes are perpendicular to each other?

Coordinate axes are chosen to be perpendicular to each other because it is convenient, calculations are easier. This is what I have read. But in case that coordinate axes are per example 60 degrees ...
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3answers
109 views

Why doesn't a force perpendicular to the direction of motion change the speed?

It changes direction but not speed and this is proved in experiments. But is there any more "deep" reason as that space has isotropy and energy must be conserved per example?
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1answer
87 views

Is the Klein-Gordon equation one evolution equation for states?

I remember when first studying relativistic QM that it was argued that viewing the Klein-Gordon equation as one evolution equation for a state like the Schrodinger equation leads to some issues. This ...
3
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1answer
228 views

How does physics research work? [closed]

I am going to try and be as short and as concise as possible. I was thinking these last few days about how we're still trying to discover a unified Theory of Everything. The question is: how is this ...
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1answer
55 views

Is there no law which includes an addition of different types quantities? [duplicate]

I haerd that we cannot add two different types quantities. Is there no law which includes an addition of different types quantities? In the future, maybe we find a law like this $$F = \frac{\...
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3answers
67 views

Source of “Physics is solved” quote [closed]

I have a vague memory of some prominent scientist in the time just before quantum mechanics got going bragging that physics was solved except for a few edge cases and some slightly more precise ...
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2answers
70 views

What does Dirac mean by “proximity”?

I was reading Dirac's "The Principles of Quantum Mechanics" and on page 7 he makes the following statement: "Like the fundamental concepts (proximity, identity) which everyone must learn on his ...
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1answer
65 views

Does intuition really matter in the beginning of any new physics course? [closed]

Encountering some new courses like quantum mechanics, theoretical solid state physics and some other courses made me feel dumber than I ever felt.  Basically, I'm that kind of students who hate to ...
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0answers
66 views

Easy To Learn Advanced Physics [closed]

I am a first-year undergraduate student and I am looking to do summer research in physics. By the time I finish this year I will have completed intro courses in Mechanics, Electricity and Magnetism, ...
3
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1answer
113 views

Challenging and “serious” introduction to basic physics [duplicate]

I know most of a standard US undergrad math degree - multi-variable calculus, real and complex analysis, point-set topology, basic abstract algebra, etc. etc. I know very little about physics beyond F=...
1
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1answer
35 views

What's a word that encompasses both transmit and receive?

Is there a word that can be used to describe in a general sense the action of an antenna, whether transmitting or receiving? My best guess is "couple" as in coupling energy from a wire to EM wave, ...
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0answers
71 views

Lecture notes by Rudolf Mössbauer

Rudolf Mössbauer was an excellent lecturer. He gave lectures on Neutrino Physics, Neutrino Oscillations, The Unification of the Electromagnetic and Weak Interactions and The Interaction of Photons and ...
4
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1answer
75 views

(Apparent) Paradoxes in General Relativity [closed]

I find that studying the paradoxes of special relativity, such as the twin paradox, ladder paradox, and Ehrenfest paradox, and their resolutions, helps me to understand it. Are there any similarly ...
2
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1answer
76 views

How are sound waves and gravitational waves different?

What is the difference between sound waves and gravitational waves? The source term in GR as I understand it is the energy-momentum tensor which contains pressure, which makes me think sound is a ...
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2answers
145 views

Why does physics “make sense”? [closed]

I was wondering if anybody had an explanation for why physics makes so much sense to us humans. In physics, many concepts just seem to make sense to me, but I cannot explain why. You may say that this ...
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2answers
57 views

What are some benefits of using a higher temperature of water for cleaning? [closed]

There are lots of benefits of using a higher temperature of water for cleaning. List them!
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2answers
67 views

What is the most useful to learn out of complex analysis and differential equations for undergraduate studies in physics? [closed]

Next year I'm planning to start on my bachelor's in physics, however, I have already started taking some undergraduate courses in mathematics and next semester I will have to choose between complex ...
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0answers
35 views

How cold does Something need to be for String Theory to be relevant?

I’ve often read casually that in order for modern string theory and other competing quantum gravity theories to be tested absolutely enormous temperatures (or rather energy densities) are required. ...
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2answers
61 views

Explanation of notation change between 1D and 3D T.I.S.E.?

I am currently reviewing this webpage, near the end it shows how the one-dimensional time independent Schrondinger equation can easily be extended to three dimensions. My question is specifically ...
2
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1answer
80 views

Real world intuitive explanation of Jerk

If $a(t)$ denotes the acceleration of an object, then $a^\prime(t)$ represents the jerk. I'm looking for an intuitive explanation of this phenomena. I'm hoping the following anecdote provides the ...
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2answers
146 views

Why is quantum mechanics called quantum *mechanics*? [closed]

At least a few books have "Quantum Mechanics" in their title, e.g., Sakurai's Modern Quantum Mechanics. However, I don't think measuring spin, which is "the" way of introducing quantum mechanics, ...
1
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1answer
114 views

If two different theories describe experimental observations equally well, can one be said to be more valid than the other? [closed]

Assuming both use accepted rules of logic, which of the two theories would be accepted and on what basis, for example: simplicity etc.
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0answers
29 views

Is there a term for the study of asteroids?

I'm trying to find the name for the academic specialty of studying asteroids, but I can't seem to find any. For example, there is a distinct wikipedia page for "Planet" vs "Planetary science". Is ...
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0answers
14 views

What is gradient-flow modified operators in thermal gauge theory?

This is going to be a very "soft-question". I do not fully understand German, so I am not sure if "Korrelationsfunktionen mit Gradientfluss modifizierten Operatoren bei endlicher Temperatur in ...