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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40 views

What is the significance of the height of these verical lines in Thermal Conductivity graph?

The following image is from the Wikipedia Article on Thermal Conductivity: Please click here if you want a good image resolution, as I was unable to upload it here due to "Unsupported Image Format". ...
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0answers
48 views

How the universe look like if it did not obey relativity theory? [on hold]

I have tried to think about a way to do FTL communication and sometime there was a statement that "We can only pick 2 from 3, Relativity | Causality | FTL" In our universe is not possible to do FTL. ...
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1answer
88 views

Will the debate over smallest entity possible ever end? [closed]

I think that we can't find the smallest possible entity because more sub particles would be consequently discovered. Will the debate ever end?
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10answers
10k views

Is it really better for the environment if I take the stairs as opposed to a lift?

This question is inspired by a sign I saw at a lift, which said something like: Going up 1 floor or down 2 floors? Take the stairs, it's better for your health and for the environment. There's no ...
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0answers
33 views

Asymptotic quantization and scattering theory

There is one idea presented on some papers by Ashtekar called "asymptotic quantization". This is reviewed in the case of gravity on this paper. Moreover, this seems to be the basis of the recent work ...
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0answers
152 views

An uncertainty principle modification of GR? [closed]

Can we modify the GR field equations to contain uncertainty and then use an assumption that the uncertainities are somehow related? Are there any known attempts that try to extend the established ...
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0answers
29 views

Newton's explanation for interference [duplicate]

If Isaac Newton believed that light is a particle, then how did he explain the interference phenomena?
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0answers
35 views

What does Planck's Length signify about the reality? How do we know that such a length exists? What is the history of its development? [duplicate]

Wikipedia Says - In 1899 Max Planck suggested that there existed some fundamental natural units for length, mass, time and energy.[5][6] These he derived using dimensional analysis, using only the ...
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1answer
84 views

Did R. Feynman know about the different notations for exact and inexact differentials? [closed]

I remember reading a long time ago, the story of a student taking R. Feynman for responsible of her (I think it was a woman, not sure though) fail at an exam of physics because what was written in her ...
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0answers
22 views

Quantum Non-Demolition of entangled superposition using an electron with infinite spin

Disclaimer: I have no idea what I am talking about, as I just started college and barely understand quantum physics. If an electron can have a linear velocity of the speed of light, theoretically ...
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2answers
124 views

Do we predict in Physics? [closed]

Being just a learner,whatever little I know about the laws of nature,I think we analyze the consequences and the cause of any event happening around us as well as we explain them by the existing laws....
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3answers
64 views

What is the necessity to universalise a law? [closed]

What are the necessary conditions or observations that are required for universalisation of a law? I am not good at English so by universalise I mean to claim something to be universal. So how can ...
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2answers
80 views

What species of arguments are used in physics and science in general? [closed]

Arguments are needed to provide theories but I'm only used to deductive reasoning in physics and science, maybe due to their empirical nature. Does anyone know if other species of arguments have or ...
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1answer
502 views

Where can/should I, as a high schooler, publish a paper regarding the derivation of a formula? [closed]

For a high school engineering project, a friend and I have found ourselves deriving an equation for how to most efficiently configure a system. We found an equation that, given a few parameters about ...
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0answers
29 views

A fast and automated way to check if symmetry (space group) operations preserve a lattice

Consider the simple cubic lattice. There are symmetry operations which preserve the lattice symmetry such as translations and rotations around certain axes. There are also symmetry operations that do ...
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1answer
125 views

Do Spivak, Susskind and Feynman books build a good foundation before starting an undergraduate physics course? [closed]

I'd like to switch to a physics undergraduate (Bachelor of Science) course next year, until the end of next year I won't be able to do much due to medical reasons, but I will be able to study for ...
1
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0answers
31 views

A fitting example for discoveries that were hypothesized before the discovery [closed]

(The motivation for the below question is to explain the concept of the so-called scientific evidence to laymen.) (I am sorry that the question is somewhat broad.) What would be a fitting (and ...
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0answers
16 views

Entry Level Physics Texts [duplicate]

Fellow Physics community, I am an undergraduate about to graduate with an Econ major & Math minor. I have never taken a physics class at the university & it bugs me how ignorant I am about the ...
1
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1answer
50 views

Physics Graphic Simulations

I am interested in modeling physics using graphics simulations. I took a python course with CS majors and one of the assignments was to simulate a planet orbiting a star. That being said, I was ...
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0answers
60 views

Open problems in Hamiltonian Dynamics and Symplectic Geometry [closed]

I'm starting an undergraduate research on Mathematical-Physics and the topic I chose is Hamiltonian mechanics (and its formalism, Symplectic Geometry). I'm looking for some interesting open problems ...
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1answer
30 views

Career advice with background in condensed matter physics [closed]

I have background in computational condensed matter physics (both BSc and MSc). But I find this field boring now. I am interested in computer simulations but not in condensed matter physics. So, for ...
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0answers
40 views

All the electric fans in my apartment have started simultaneously producing a high frequency sound. Why?

I woke up last night hearing an odd high pitched noise that I am not used to. I usually keep a few fans running because I have a train that runs nearby and the white noise blocks it out. I tried ...
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2answers
80 views

Max. Entropy = Min. Energy?

If a closed system has a submaximum entropy, then we can assume that in theory we can extract energy and thus the system goes to the maximum entropy state and no free energy is available. On the other ...
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3answers
53 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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5answers
613 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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1answer
51 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
56 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
87 views

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

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
148 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 ...
2
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1answer
94 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
18 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 ...
1
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1answer
49 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
35 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
59 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
30 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
24 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
51 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 ...
0
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1answer
40 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
18 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 ...
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1answer
33 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
68 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
82 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
117 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
146 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
132 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?
3
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1answer
96 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
248 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
58 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
83 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 ...