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.

learn more… | top users | synonyms

4
votes
0answers
24 views

Pointwise and uniform convergence. Examples from physics

I am a first-year mathematical student, and from a mathematical perspective I understand the difference between pointwise and uniform convergence of sequences and series of functions. However, I have ...
-8
votes
0answers
40 views

What a physicist can work in after the graduation? [on hold]

What a physicist can work in after the graduation? if you ask : what is the branch in physics he graduated from! i say give me a view in every domain. thanks
0
votes
2answers
46 views

How would we experience sound if light velocity was (much) smaller?

Imaging the velocity of light was just 110% or so of sound's. How would we experience sounds? How would a guitar sound, for instance? My best guess so far is that, as guitar's strings moved more ...
-2
votes
0answers
20 views

Are there any benefits from doing Physics MCQs without a given answer key? [on hold]

If I have a answer key, I can know where I'm wrong and solve again. But many books give MCQs without answer key, how should I use them?
2
votes
2answers
85 views

What is high energy physics?

Is high energy physics the same as particle physics? Does research in high-energy physics include things like quantum gravity, string theory and quantum field theory? Is unifying the four ...
-2
votes
0answers
39 views

which of the many interpretations of Quantum Mechanics most well explained? [closed]

I have been studying the ensemble interpretation by Leslie Ballentine which looks very well explained and has reason for every(almost every) axiom. I am seeking new your opinion.
-6
votes
0answers
63 views

Modern Quantum Mechanics, Sakurai [closed]

As a graduate student am I supposed to finish the entire material of "Modern Quantum Mechanics, Sakurai" ?
-2
votes
0answers
30 views

Subject is Maths that would complement Physics? [closed]

Suppose Math has 5 sub parts- Analysis: Analysis, Complex Analysis, Measure theory and integration,Functional Analysis Algebra: Group Theory, Vectors space-rings-modules, Galois, Algebra Number ...
1
vote
0answers
23 views

Prepare for HEP-th graduate application: books, research opportunities,etc [closed]

I want to specialise in high-energy physics theory. I feel quiet unconfident because the I just knew that the field is insanely competitive, so I really need your advice to guide me a bit, and any ...
5
votes
1answer
78 views

Unification of Weak and Electromagnetic forces

I'm curious how the weak and em forces relate to one another. My knowledge in this area is weak (ha) but I am interested in an explanation for how these two forces relate to one another, and how / why ...
2
votes
2answers
86 views

Mathematics needed for string theory [duplicate]

I'm interested in cutting edge string theory studied by research physicist. I'm wonder what mathematics is needed and how far am I in terms of mathematics background needed and how much more ...
-2
votes
0answers
21 views

Online resources for studying physics [duplicate]

Is there any website out there where they specialize in providing problems, exercises, tests, exams and their steps and solutions in physics? For example, sometimes when I want to study for ...
1
vote
4answers
737 views

What exactly is meant by infinity?

What exactly is meant by infinity when I see it in a physics equation (always something wrong?)? And in experiment how many orders of magnitude can be treated as infinity (say, if infinity is ...
0
votes
2answers
38 views

Solid Mechanics book recommendations

I'm searching for a book on Solid Mechanics that explains the topics intuitively (similar to Kline explanations on Calculus: An Intuitive and Physical Approach). Also the book should have the ...
0
votes
0answers
24 views

A simple model for vehicles on different surfaces? [closed]

Just to let you know my level of knowledge/ability, I studied a degree that included some dynamics, but that was nearly 15 years ago, so I'm rusty. I'm a games programmer, and I tend to understand ...
-1
votes
0answers
30 views

A start point to learn cosmology [duplicate]

My major is not physics in university. So, My knowledge about physics is limited to the general physics I , II courses which we had to pass. On the other hand I heartfully like to learn cosmology. I ...
0
votes
2answers
70 views

What is an example of something that in theory thought to be impossible but not anymore? [closed]

I usually tell my parents "it's impossible to go faster than light", but they keep telling me "soon" (soon it will be possible to go faster). I know this is impossible in theory, but how much can I ...
4
votes
4answers
1k views

Which one to learn first: Special or general relativity? [closed]

I am extremely interested in self-learning Einstein's theory of relativity, but I don't know where to start. Can I make general relativity my starting point, and later look at special relativity as ...
0
votes
2answers
60 views

Is escape velocity really a velocity?

The term escape velocity is quite common to us. But we know velocity is a dimension dependent on the direction. But the escape velocity has same value irrespective of from where it is thrown from the ...
-3
votes
0answers
26 views

Is helping others grasp difficult ideas, concepts or theories not considered giving an answer? [migrated]

I know you could just leave a comment, but not in this case I couldn't. I just found this awesome app while researching on my passion, physics. I stumbled across a question about time dilation, not ...
3
votes
0answers
99 views

Worthington jets explanation: fluid phenomenon

I don't understand the reason behind the formation of Worthington jets I've been reading a bit about Worthington jets Video 1, this phenomenon is caused when something is thrown to the water as we ...
0
votes
0answers
43 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 ...
2
votes
0answers
80 views

Mathematician learning theoretical physics [duplicate]

EDIT: I was aware of the supposed duplicate. But I'm interested in a clear and focused path through the basics to advanced theoretical physics such as string theory - a path that avoids studying ...
-3
votes
0answers
30 views

Buying books that are out of print [migrated]

I've just returned the book Principles of Modern Thermodynamics, by Bimalendu Narayan Roy* to the library. It is a terrific book which gave me a much greater understanding of thermodynamics than I ...
0
votes
2answers
48 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
votes
1answer
71 views

A course in Lagrangian Mechanics [duplicate]

I would like to know: what are some of the best introductory books to Lagrangian Mechanics?
0
votes
0answers
30 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
votes
0answers
13 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 ...
1
vote
0answers
50 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 ...
3
votes
1answer
118 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
45 views

Piezoelectric effects of naturally shaped quartz crystal 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
votes
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
109 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 ...
-8
votes
1answer
80 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
votes
0answers
35 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
votes
0answers
16 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?
-6
votes
1answer
53 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
30 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
41 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
46 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
99 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
74 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 ...
7
votes
2answers
367 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
60 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
56 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
vote
3answers
111 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
70 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
122 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
99 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 ...