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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0answers
91 views

Which scientist is this?

Okay so I was watching discovery channel, in that i saw a man cleaning live electric wires of 10k volts in the air, he was not touching the ground. They said he was able to do this because of the ...
3
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0answers
96 views

My bathroom door stays open in summer [closed]

My bathroom door remains open in summer, but in the winter it stays about halfway between fully open (90 degree angle, against a window) and closed. The door is between bedroom and bathroom and it is ...
3
votes
2answers
67 views

Computational advantages of various notations for electromagnetism [closed]

Most undergraduate electromagnetism classes and textbooks use vector notation to describe Maxwell's equations. However, there are other notations like differential geometry and geometric calculus ...
1
vote
0answers
22 views

Classical Mechanics Resources [duplicate]

I hope that my question doesn't violate the posting rules. I was wondering if any of you have any resources (websites, books, etc.) for classical mechanics. My first week of classical mechanics has ...
1
vote
1answer
94 views

What defines a physical property? [closed]

The physical world around us has all sorts of properties, shape, color etc. If you move on to more complex systems, there are even more like some emotional properties etc. Why do we deem only ...
3
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0answers
37 views

How exactly are the relative strengths of gravity and electromagnetism quantified? [duplicate]

I've often heard it said that gravity is much weaker than electromagnetism, and after looking at several questions on SE, I feel that I've got at least a qualitative handle on the concept -- gravity ...
5
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4answers
818 views

Physics after a Theory of Everything [closed]

There is a lot of controversy over the existence of a Theory of Everything (ToE), and as far as I know, we are a long way from having a possible candidate. But what interests me is, what after that? ...
0
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2answers
109 views

What are some “I wish someone had parted that wisdom onto me” tips for beginning a bachelor's degree in Physics? [closed]

I start classes next Monday for Physics and I am beyond nervous. I don't really know what to expect in the big world of upper-level science. Granted, I'm only going for an Undergrad right now, but I'm ...
0
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0answers
25 views

Good book to self learn physics from beginner level [duplicate]

I am looking for a book that is similar to the Gelfand books on Algebra or Trigonometry. These really help the reader understand the material. Any recommendations for a similar book for physics?
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0answers
46 views

Why do many equations need squared powers? [duplicate]

It seems that an equation factor must be “squared” as a convenient approximation to balance out some other series of factors invisibly . Might $E=mc^{1.95}$ work as well as $E=mc^2$? Might ...
1
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0answers
52 views

Types of research problems [closed]

I got curious about the general types of research problems which one encounters in theoretical and mathematical physics like.... Creating new laws out of data like Dirac or Einstein. Considering a ...
3
votes
1answer
106 views

How do hotel peepholes only work in one direction?

Basically the title. Light can go into my room through some lenses so that I can see it, but light can't escape my room so that people outside? The article about peepholes on Wikipedia doesn't ...
-2
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1answer
106 views

Why does the symbol have an arrow? [closed]

What does the arrow in the symbol mean? Does it mean that it is a variable voltmeter and ammeter?
2
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1answer
53 views

Difference between escape velocity and speed [duplicate]

What is the difference between escape velocity and escape speed , is their any error if we use them interchangeably?
3
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0answers
93 views

What depth of learning must be achieved to sufficently understand advanced physics topics? [closed]

I was recently asked the following question by a friend of mine who is an undergraduate mathematics student, and I thought it would be beneficial to see what the members here have to say about it, as ...
0
votes
1answer
64 views

How can I properly learn relativity with an electrical engineering background? [closed]

I want to properly learn the theory of relativity, purely for self-interest. When I say relativity, I mean both flavours: special and general. Are there any good books which go into both the ...
1
vote
0answers
35 views

Frozen water cooler bottle [closed]

My water bottle for my water cooler is frozen. Should I place it onto the water cooler while it is frozen, wait till it thaws a bit, or wait till it thaws completely?
0
votes
1answer
44 views

Is there a name for leptons that are not neutrinos?

Is there a name for leptons that are not neutrinos? Not sure if its exists, its not particularly easy to search for. Is there a name for the set of charged leptons (or leptons that are not neutrinos)? ...
4
votes
0answers
77 views

Why are so many relationships in physics described by equations? [closed]

Consider $f$, some mapping between two ordered subsets of the natural numbers, $A$ and $B$. I see two ways $f$ can be expressed. The first way is an equation that defines $f$ (i.e. $f(A) = 2A$). ...
3
votes
2answers
83 views

What exactly is an arbitrary parameter?

I was reading the article Turning Points: A meeting with Enrico Fermi by Freeman Dyson (available e.g. here), and I had a question about Dyson's use of the term 'arbitrary parameter'. More ...
3
votes
0answers
60 views

Why isn't $G=1$ as common as $c=\hbar=1$? [closed]

It is standard practice in theoretical physics to use a system of units in which $c=\hbar=1$. However, even though you could also set $G=1$, most physicists prefer not to. For example, in my cosmology ...
1
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3answers
193 views

What does “the fabric of space and time” actually mean? [closed]

I've heard the term "the fabric of space and time" in both physics and science fiction, and although I know it has something to do with general relativity, I don't understand what, specifically, ...
0
votes
1answer
53 views

Does gravity affects on electrons in a noticeable way? [closed]

Is there a way to force a free electron move in a low speed in order to observe it actually hitting 'on the floor'?
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1answer
55 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 ...
1
vote
1answer
82 views

Feynman's question on the mathematical machinery underlying nature [duplicate]

Physicist Richard Feynman said in his lectures "It always bothers me that according to the laws as we understand them today, it takes a computing machine an infinite number of logical ...
1
vote
0answers
30 views

Approximating Gallons of Gas Needed for Trip (read: physics grad. with too much free time)

My departure from college has left me with an itch for physics-y problems to solve, and my boredom and free time gave way to this approximation of the gallons of gas I use for the trip to my ...
2
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3answers
247 views

Confusion about the concept of cosmological horizon

This question was inspired by this one By definition we cannot see any event happening beyond the cosmological horizon. Let us assume that the expansion rate of the universe is such that the radius ...
0
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0answers
20 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 ...
4
votes
1answer
180 views

Why do astronomers call all elements heavier than helium “metals”?

I understand that a scientific term need not be constrained by its etymology. But is there some significant reason why astronomers choose to call all elements heavier than helium "metals"? Are ...
2
votes
2answers
116 views

Does it make sense for physics to predict the unphysical? [closed]

I hear people say things like "inside a black hole the laws of physics are not valid" or "there can be parallel universes with different physical laws" or "before the big bang there was nothing". ...
7
votes
0answers
103 views

Real world applications of post-1950s High Energy Physics [closed]

Imagine a world where people knew everything we know today except for high energy physics, where their knowledge ends at our ~1950s level. Is there any real world application, any particular piece of ...
1
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0answers
45 views

Sticky physics of pasta mixture [duplicate]

When you mix cooked noodles or other "prevailing 1D pasta" like spaghetti with other ingredients like olives, pieces of meat (not minced) etc. you will probably experience the fact, that the mixture ...
2
votes
1answer
57 views

Do physicists subscribe to Occam's razor? If so, how do you define 'all things being equal'? [closed]

The question here is the title: Do physicists subscribe to Occam's razor? If so, how do you define 'all things being equal'?
0
votes
1answer
46 views

How Does Rotational and Turbulent Motion Contribute to the Pressures of Dynamical Systems?

Rotational and turbulent motion can deepen a gravity well in a galaxy or galaxy cluster. In an analysis of the mass components of a large body, this would appear to be one of the components. Does it ...
0
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0answers
25 views

What exactly is wavefield extrapolation?

I am trying to understand what exactly wavefield extrapolation is. I can understand extrapolation of a function, 'wave' and 'field' as well; but could not understand the meaning or the problem ...
1
vote
1answer
47 views

Why did the inflation era not produce decompactification of the extra dimensions of string theory?

My question is undoubtedly naive, due to lack of background, but any answers, or simply comments with short explanations of my incorrect assumptions, would be appreciated. I must point out this ...
0
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0answers
32 views

Book for quantum field theory similar to Ballentine's quantum mechanics book [duplicate]

I have been studying quantum mechanics from Ballentine's book. I enjoy such books. I want somebody here to recommendation a book for qft with similar approach.
2
votes
0answers
99 views

Undergrad in QFT/GR looking to do string theory Ph.D [closed]

I am currently a third year undergrad in physics who is currently taking QFT and GR. I took these classes just out of pure interest in the subjects but I find that my mind is being blown almost every ...
2
votes
4answers
164 views

Quantum entanglement and information transfer: Does particle separation process set speed limit?

Background I recently read that a group had managed to overcome both the communication loophole and the detection loophole for Bell's theorem. In reading the article, I started to think about another ...
2
votes
0answers
137 views

Which problem is Oppenheimer working on in this picture? [closed]

Does anybody recognize the equations on the blackboard? Above his hand, with the $\gamma_k$ term and its complex conjugate, it looks like a written out matrix representation of a Hamiltonian $U$, ...
0
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0answers
14 views

Which are some good books to learn about quantum states? [duplicate]

I am aware of the book Geometry of Quantum states: An introduction to Quantum Entanglement by Bengtsson & Zyczkowski. I have read the book Quantum Mechanics: A Modern Development by Ballentine.
4
votes
1answer
119 views

Can someone explain this joke about the fine-structure constant and Pauli? [closed]

I was once told this joke: In Dec 1989 Physics Today ,page 9, David Gross wrote "...One of the best of the many Pauli jokes tells of Pauli's arriving in Heaven and being given, as befits a ...
-3
votes
1answer
105 views

If this were possible, would it count as a modification of quantum mechanics? [closed]

This question will be re elaborated to meet the standards of this site in shot
0
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1answer
39 views

What are some good introductory book references on time-varying electromagnetic fields?

What are some good introductory book references on time-varying electromagnetic fields? I need a refresher on the physics background on this topic. I intend to do research in electric motor-related ...
0
votes
2answers
88 views

Textbook for mathematical Lagrangian mechanics [duplicate]

I'm looking for a textbook or online notes or a review article etc on a rigerous formulation of Lagrangian mechanics. I'm well aware of the book by Arnold but I would like something to accompany it. ...
0
votes
1answer
59 views

Naming anti-electrons and anti-protons [closed]

I think I understand why an anti-electron is called a positron (since it symbolizes positive charge) But why then is anti-proton called an anti-proton and not a negatron?
0
votes
1answer
50 views

What is an awkward constant and is there a relation to ad-hoc hypotheses?

[I'm not entirely sure whether this is the right board, since it is not a technical but a soft question]. I'm reading the textbook "Spin Dynamics - Basics of Nuclear Magnetic Resonance", 2nd ed., ...
0
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0answers
19 views

Resources on the discreteness of space and time

Does anyone know any books or other sources of information on the discreteness of space and time? The only ones I've managed to find require graduate level physics knowledge, which sadly I do not ...
0
votes
1answer
32 views

5UDH Tandem electrostatic accelerator

What does UDH stands for in the name of an electrostatic accelerator 5UDH-2 Tandem accelerator? Does it is related to its working or just a trade mark?