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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0
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0answers
32 views

Applicability of Occam's Razor [on hold]

Is there a solid mathematical or physical argument on the applicability of Occam's Razor at cosmological scales, or with regard to physical laws? I've recently become aware of mathematical ...
-4
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0answers
88 views

Physics major in university [on hold]

When I was 10, I started reading college-physics books; I always loved physics. I'm 17 years old and, on my own, learned calculus, real analysis, complex analysis, functional analysis, differential ...
0
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2answers
45 views

What is the meaning of this definition of potential energy?

The isolated system of particles is being observed. In the coursebook, $\vec F_\mu$ is by definition the vector sum of forces of all other particles acting on $\mu$-th particle. Usually, potential ...
0
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1answer
57 views

A course in Lagrangian Mechanics [duplicate]

I would like to know: what are some of the best introductory books to Lagrangian Mechanics?
0
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0answers
28 views

Can anybody recommend a book on quantum physics for a mathematically minded student? [duplicate]

Basically what the title says. I'm a math/physics double major going into my second year, but I'm much more math oriented. I'll be taking a quantum class in the fall and I'd like a book that ...
2
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0answers
11 views

Is there any good literature about conceptual designs of Quantum (Micro-) Black Holes Machines?

I did some research and found this book: Quantum Black Holes, 2014 http://link.springer.com/book/10.1007/978-3-642-38939-9 It seems good for a repetition of current status of (Quantum) Black Hole ...
0
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0answers
11 views

Is there any famous physicist never went to university? [migrated]

With restriction, after the year 1900. Is there someone just self-taught and become very famous in physics?
-2
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0answers
31 views

Required knowledge for QKD [closed]

Firstly, not to mention, I think quantum mechanics and electrodynamics are required. I have found that also knowledge in classical cryptography is helpful (abstract algebra) What I most want to know ...
1
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0answers
36 views

From Civil Engineering undergrad to Physics grad [closed]

I am an undergraduate Civil Engineering student. When I finish my undergraduate studies I want to pursue a masters degree in Physics (my ultimate goal is to get a PhD in Physics). Due to limitations ...
-6
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0answers
39 views

2015-The hottest year [closed]

I am sure that Sun is responsible for these hottest days. But, I can't approach the correct scientific reason. I am pretty sure that Sun is mostly dealt in Physics and so, probably, it is the most ...
-3
votes
0answers
41 views

How do physicists think? [closed]

I know this is not really a question of physics, but an interesting one. And i am certain that i am asking this to the right audience. lately, i have been having trouble solving physics problems. I ...
3
votes
1answer
111 views

Was quantum mechanics made to fit the Bell violations or they just happen to fit them?

Entangled bipartite states can violate the CHSH inequality upto $2\sqrt{2}$ with suitable measurements. Is it that in nature we don't witness violation of CHSH more than this and quantum mechanics ...
2
votes
0answers
28 views

Piezoelectric effect of natural irregular quartz crystal in aqueous solution or electromagnetic field for maximium Q?

Background Based on helpful comments and links here and also from my question on the electronics stackexchange, I have learned that the quartz crystals are nature's transducers of energy, allowing ...
0
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0answers
17 views

Need your Kind Recommendations and References Please [duplicate]

I studies Physics in my high school about 5 years back and i have never touched physics after that.I am planning to revise that very soon. I am now planning to do college physics on my own at my home ...
0
votes
1answer
104 views

Are Feynman's Six Easy Lectures still relevant today?

I haven't learned anything about modern physics at the university yet, but next year I will, and in the summer before I thought I would read this book, Six easy lectures from Richard Feynman. It was ...
-7
votes
1answer
73 views

Envisioning the hottest topics in physics for the next decade [closed]

Last decade was the decade of topological insulators $\&$ superconductors, topological order, tensor networks, topological quantum computation and spacetime= entanglement sort of ideas and many ...
0
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0answers
32 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 9e9 or 8.85419e-12 its rather annoying to write in all those exponents (yeah I know ...
0
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0answers
15 views

Radial excitation and orbital-angular momentum excitation

Sorry. Just want to make sure, but what does radial excitation and orbital-angular excitation mean in the context of bound states? Just higher $n$ and $\ell$ quantum number?
-5
votes
1answer
48 views

Does gravity slow entropy? [closed]

Just got to thinking about why time slows in a gravitational field. It occurred to me that, in a gravitational field, the closer you get to the source the slower time seems to travel. But also, the ...
0
votes
2answers
28 views

Is net work and total work same?

According to my text book Total Work = Delta Kinetic Energy = KEf - KEi But then work is defined to be dot product of Force (vector) and Displacement (vector). Also to my knowledge work is ...
0
votes
1answer
35 views

Algebraic properties of fundamental physical constants

A few weeks ago I started wondering if there's any reason for a given fundamental physical constant, like Boltzmann's one, to enjoy some algebraic properties, for example being rational/irrational or ...
0
votes
1answer
40 views

Superscript on density matrix

I have been asked in homework to solve the optical bloch equation for the initial condition of $\rho_{22}=0,\rho_{12}=0$. Professor gave a hint of the general equation and let us carry it from here. ...
2
votes
2answers
44 views

Is Venus in the habitale zone of a robot (transistor CMOS brain, metal body) ? Any definition by NASA?

So the robot's information-processor works based on CMOS technology, the energy is powered by lithium-ion battery/solar and the body is made of stainless steel. For reference you can think of the ...
2
votes
1answer
80 views

Learning physics from a strong math background? [closed]

I have a master's degree in operations research and took several PhD level math courses. In particular I'm most familiar with analysis/measure theory, probability theory, and stochastic processes, and ...
2
votes
4answers
55 views

Why do object appear smaller when it is further away?

This might have nothing to do with physics but why does the size of an object change when it is further away from me compared to when it is closer to me? Can someone perhaps explain this through an ...
6
votes
2answers
301 views

What is the difference between a “model” and a “theory”?

In my past questions I have used the terms "model" and "theory" interchangeably. So we have statements along the lines of The Standard Model is our best theory of particle physics but I have also ...
1
vote
1answer
58 views

Order of index in Lorentz transform

I am reading Schwartz's "QFT and the standard model". On pg 13 he gives the Lorentz transform of a rotation around the x-axis: $ \left( \begin{array}{cccc} 1 & 0 & 0 & 0 \\ 0 & 1 ...
-1
votes
2answers
54 views

What are the consequences of a non-computable universe?

I have seen that is is debated if the universe is digital, computable or non-computable. what specific consequence could this have in the format of the laws of physics? Or would that mean that we will ...
1
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3answers
109 views

“Complete” confusion

The word "complete" seems to be used in several distinct ways. Perhaps my confusion is as much linguistic as mathematical? A basis, by definition, spans the space; some books call this "complete" -- ...
1
vote
3answers
56 views

Why does driving faster make my windshield catch more rain?

I've noticed that, when I'm driving and it's raining, the faster I go the more rain I get on the windshield and the faster I have to run the wipers to compensate. When I'm stopped at a red light I ...
2
votes
0answers
117 views

Why does regularization work in this Bessel function integral?

I encountered some days before an integral representation for a modified Bessel function and should differentiate it. But in this representation : $$K(\omega,a)=\int_0^{\infty} \frac{ds}{s} ...
1
vote
2answers
94 views

Why can't we precisely define physics? [closed]

While reading a textbook, I came across this statement: "A precise definition of physics is neither possible nor necessary." I was curious why it is not possible but the textbook never ...
1
vote
1answer
59 views

Quark-gluon plasma: status [closed]

Can we say that a QGP has been observed or is there only suggestive evidence? Is the idea that string theory, through the AdS/CFT correspondence, could help to understand this new state of matter ...
1
vote
1answer
64 views

Is 'Boltzon' an accepted name for particles following Maxwell-Boltzmann (MB) statistics?

In my curriculum during one of my statistical mechanics visiting lecture classes, our teacher was referring comparatively macro particles following MB statistics as "Boltzon". But I have searched ...
5
votes
3answers
424 views

Explaining a quote by Weinberg about the signifcance of symmetry groups in physics

When skimming through a book, I found this quote: The universe is an enormous direct product of representations of symmetry groups. —Steven Weinberg I am a mathematician (so I know only basic ...
4
votes
1answer
381 views

Does “finite” include zero?

Infinity, is clearly not finite. But there is some dissent on whether or not zero is finite. I have seen authors use "finite" to indicate the value of $0$ is excluded as well as infinity. Is there ...
1
vote
1answer
58 views

Understand the relation of time and the space dimensions of spacetime?

I assume the relation of the three spacial dimensions and the time dimension is handled purely in the mathematical domain, usually. But is there any intuitive description of this relationship, how ...
0
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0answers
50 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 ...
19
votes
3answers
2k views

Programming in physics [closed]

How important is programming in physics? I am studying physics at university and these first years there is actually no approach (as it is understandable) to what working in physics is like. Now, I ...
0
votes
1answer
64 views

What physical properties can we measure most accurately?

As far as I am aware, frequency is the most accurate physical property we can currently measure. This has led us to very high standards of experimental verification of e.g QED predictions and the CMB ...
1
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0answers
46 views

Difference between maths in physics degree and maths in a maths degree [closed]

I hope this question belongs on this site. If not, please feel free to recommend another site to move it to. Basically, I was wondering what are the main differences between the maths you learn in a ...
42
votes
6answers
4k views

What physics paper would a high school student be able to read?

I'm looking for a physics paper which a typical high school student who is new to physics would be able to read and grasp the general idea of the purpose, setup and results, if not the details. To be ...
0
votes
1answer
73 views

Laplace-Beltrami vs d'Alembert operators in flat vs curved space-time

I am confused with the difference between Laplace-Beltrami (LB) and d'Alembert operators in flat/curved space-time. d'Alembert operator in flat space-time (Minkowski) is defined as $$\Box= ...
0
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0answers
70 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 ...
2
votes
1answer
72 views

Statistical Mechanics vs Statistics

Just how much of a representation of statistics do we get in a statistical mechanics curriculum. What are some of the useful facets of stat not in stat mech/quantum mech that physicists should really ...
3
votes
3answers
57 views

What is nuclide notation referring to? Only the nucleus or the whole atom?

sorry that this is an easy question but I am just a bit confused about nuclide notation. When you say e.g. $^{240}_{94}\text{Pu}$, are you referring to the atom of $\text{Pu}$ or only its nucleus? It ...
1
vote
2answers
39 views

What does excitation in an atom mean?

This is not regarding the definition of excitation itself. What I'm having trouble with is the difference between "electron excitation" and "atom excitation". When I electron inside the atom gets ...
1
vote
0answers
36 views

All I need to know to enter undergraduate studies in pure physics [closed]

I want to pursue pure physics after my secondary high school. I was wondering if I know all I need to know to get into this stream. So please list out all the topics I need to know before my ...
-3
votes
2answers
113 views

Using mega (=10^6) when writing by hand? [closed]

I just solved a problem which had answer 1.7*10^6 m (m=meters) If I wanted to write this using M=10^6 it would be 1.7 Mm, which if I write it by hand would look like "1.7 mm" which is confusing. Is ...
1
vote
1answer
47 views

Rain system movements and highways?

In my free time I sometimes enjoy watching the weather or radar and trying to predict how a rain system will move. Pretty often I notice that a small rain system or even a large one will congregate or ...