Top Questions

19 votes
8 answers
4k views

Do we understand chemistry from particle physics? [closed]

10 votes
3 answers
5k views

How much pressure would it take to compress a block of solid steel into one-tenth the original volume?

12 votes
3 answers
3k views

Given gravitational lensing, why would black holes visually appear black?

7 votes
3 answers
1k views

Is there a formalization of the butterfly effect?

8 votes
3 answers
1k views

Why do valence electrons not push each other away?

11 votes
4 answers
889 views

Do hanging masses contribute to the mass of the entire system?

7 votes
7 answers
1k views

Does the equivalence principle only apply for the gravitational field of an infinitely sized body?

9 votes
2 answers
1k views

What would your reflection look like if a mirror was going close to the speed of light?

4 votes
4 answers
854 views

Is the spontaneous flow of heat to thermal equilibrium an explicit law or is it implicitly assumed in thermodynamics?

4 votes
5 answers
240 views

Where does $4\pi$ come from in electromagnetism?

6 votes
3 answers
2k views

Something fishy with canonical momentum fixed at boundary in classical action

4 votes
3 answers
685 views

Young's double slit experiment with two glass slabs

4 votes
3 answers
596 views

Why isn't work a state function?

2 votes
3 answers
391 views

What is the point of knowing symmetries, conservation quantities of a system?

0 votes
4 answers
177 views

Why cars don't accelerate according to $F = ma$?

6 votes
1 answer
356 views

Why doesn't the liquid in a liquid-in-glass thermometer slide down when you turn it upside-down?

0 votes
2 answers
149 views

Are there any non-SI base units? [closed]

0 votes
3 answers
186 views

Basic doubt in quantum mechanics

3 votes
2 answers
217 views

Question about the identity operator and the bosonic ladder operators

2 votes
2 answers
195 views

Can the composition law of a group be defined only when considering a representation or realisation of the Group?

0 votes
4 answers
138 views

General Doubt. My doubt about combustion

2 votes
3 answers
161 views

Orbit description in Schwarzschild metric

3 votes
1 answer
137 views

Force applied to sphere on a smooth surface

2 votes
3 answers
126 views

At what point does a line spectrum become a continuous one?

1 vote
2 answers
98 views

Why does the change in probability not depend on the potential for a quantum mechanical particle?

1 vote
3 answers
104 views

What are relativistic particles? [duplicate]

2 votes
2 answers
97 views

Confusion related to emf in a loop

0 votes
1 answer
93 views

Black holes, singularities and topology in relativity

3 votes
2 answers
110 views

Some integrals in QED Renormalisation

3 votes
2 answers
66 views

Why is the general unit for energy (in terms of energy bills) $\rm kWh$? [closed]

3 votes
2 answers
130 views

Why equation 5.29 in Schroeder's Thermal Physics is not equal to 0?

2 votes
3 answers
76 views

How do vacuum bubbles "dress" terms in the $S$-matrix numerator?

0 votes
4 answers
73 views

On Inertial Reference Frames

2 votes
4 answers
151 views

Does Bell’s theorem rule out changing hidden variables?

0 votes
3 answers
43 views

What is the temperature at which plasma (the fourth state of matter) forms?

3 votes
4 answers
115 views

Are the postulates of QM independent of interpretation, or based on Copenhagen?

4 votes
1 answer
113 views

Supressing proton and neutron decay?

0 votes
1 answer
66 views

Why do objects with more mass fall at a faster rate (factoring in air resistance)? [duplicate]

5 votes
1 answer
103 views

Why do we rescale momenta after integrating out high momenta in Wilsonian renormalization?

0 votes
2 answers
97 views

Why are the equations of motion for a free quantum field theory always linear?

2 votes
2 answers
122 views

A confusion: Why are composite bosons possible?

0 votes
5 answers
115 views

Why $VdP$ term omitted in isothermal Work?

1 vote
4 answers
145 views

All the logically possible ways to get around Bell-type inequalities

1 vote
2 answers
63 views

Bucket leaking mass in special relativity

2 votes
1 answer
62 views

In what sense is $\int (u \cdot \nabla) u \cdot u dx$ an energy flux?

0 votes
1 answer
98 views

Can the velocity of an image produced by a plane mirror be greater than that of light?

2 votes
1 answer
110 views

Confusion about tensors in $SU(3)$


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