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Physics

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 Guru
Accepted answer and score of 40 or more. This badge can be awarded multiple times.
Awarded 1172 times.
Is two cars colliding at 50mph the same as one car colliding into a wall at 100 mph?
Awarded Apr 26 at 20:16
Air pressure on Noah's Ark
Awarded Mar 18 at 7:23
Difference between 1PI effective action and Wilsonian effective action?
Awarded Feb 26 at 13:07
Why would one write a vector field as a derivative?
Awarded Feb 25 at 21:45
Why is there a 'Temperature' and a 'Feels like (Temperature)' in weather apps? What's the difference between the two?
Awarded Jan 6 at 12:02
Why/How is this Wick's theorem?
Awarded Jan 5 at 7:40
How far out from the Sun is visible light still sufficient to read a book?
Awarded Dec 28, 2025 at 5:01
Why do we feel heat from infrared light but not from shorter wavelengths?
Awarded Dec 16, 2025 at 9:16
What is entropy really?
Awarded Dec 8, 2025 at 23:32
When Eigenfunctions/Wavefunctions are real?
Awarded Dec 1, 2025 at 8:52
Why do metals burn you when they've been left outside in direct sunlight?
Awarded Nov 21, 2025 at 21:40
Where does the extra kinetic energy of the rocket come from?
Awarded Nov 7, 2025 at 15:30
Maxwell in multiple dimensions: What happens to curl?
Awarded Nov 3, 2025 at 16:46
Why do we use Hermitian operators in QM?
Awarded Sep 11, 2025 at 23:06
I found that we can calculate the time of solar eclipses that will happen in the very far future. Do we need relativity in this calculation?
Awarded Aug 14, 2025 at 14:34
Equation of a torus
Awarded Aug 9, 2025 at 22:07
If we remove all electrons from a conductor, how can the positive charge rearrange itself?
Awarded Aug 5, 2025 at 21:06
Explanation for negative specific heat capacities in stars?
Awarded Jul 30, 2025 at 9:33
How do you make a spherical radio wave?
Awarded Jul 17, 2025 at 13:37
Why can't d'Alembert's Principle be derived from Newton's laws alone?
Awarded Jun 22, 2025 at 0:20
What symmetry causes the Runge-Lenz vector to be conserved?
Awarded May 27, 2025 at 8:46
What's the deal with momentum in the infinite square well?
Awarded May 15, 2025 at 10:32
What is the current limit for a photon's rest mass?
Awarded May 2, 2025 at 19:22
Could you please give an intuitive definition of chemical potential?
Awarded Apr 30, 2025 at 15:24
Does $E = mc^2$ apply to photons?
Awarded Apr 20, 2025 at 1:54
What're the relations and differences between slave-fermion and slave-boson formalism?
Awarded Mar 28, 2025 at 18:42
Why is the contribution of a path in Feynmans path integral formalism $\sim e^{(i/\hbar)S[x(t)]}$?
Awarded Mar 6, 2025 at 4:43
Why doesn't the uncertainty principle contradict the existence of definite-angular momentum states?
Awarded Feb 26, 2025 at 13:37
What situations in classical physics are non-deterministic?
Awarded Feb 15, 2025 at 15:30
Systematic way to draw all inequivalent Feynman diagrams
Awarded Feb 11, 2025 at 7:36
Why is angular momentum a vector?
Awarded Jan 5, 2025 at 17:04
Difference between electric field $\mathbf E$ and electric displacement field $\mathbf D$
Awarded Dec 31, 2024 at 4:10
From Lagrangian to Hamiltonian in Field Theory
Awarded Dec 30, 2024 at 4:51
Why is there no theta-angle (topological term) for the weak interactions?
Awarded Dec 14, 2024 at 13:39
Would a uranium 235 fuel pellet the size of Earth explode?
Awarded Dec 12, 2024 at 5:18
Why does the motion of a gas never stop?
Awarded Dec 3, 2024 at 2:25
Temperature and time dilation
Awarded Nov 19, 2024 at 16:51
There is mathematics in physics but is there any physics in mathematics?
Awarded Nov 16, 2024 at 16:58
Why on-shell vs. off-shell matters?
Awarded Oct 14, 2024 at 13:55
Why exactly do we say $L = L(q, \dot{q})$ and $H = H(q, p)$?
Awarded Oct 13, 2024 at 20:18
How far apart are galaxies on average? If galaxies were the size of peas, how many would be in a cubic meter?
Awarded Oct 7, 2024 at 15:23
Instantons, anomalies, and 1-loop effects
Awarded Oct 7, 2024 at 14:35
Do solar panels get less hot than objects of a similar color?
Awarded Sep 30, 2024 at 8:52
Could you compress chocolate such that it has the same density and shape as a real copper coin?
Awarded Sep 27, 2024 at 6:12
Uncertainty in parenthesis
Awarded Sep 24, 2024 at 17:50
Can light become a satellite of a black hole?
Awarded Sep 5, 2024 at 2:38
When a submarine blows its ballast and rises, where did the energy for the ascent come from?
Awarded Aug 27, 2024 at 8:42
Why do we hear frequencies in the basis of sine waves?
Awarded Aug 22, 2024 at 15:20
Do the laws of physics evolve?
Awarded Aug 7, 2024 at 13:06
Can the Lorentz force expression be derived from Maxwell's equations?
Awarded Aug 4, 2024 at 20:48
Why is the nucleus of an Iron atom so stable?
Awarded Aug 3, 2024 at 1:49
Why does the pet's water bowl overflow?
Awarded Jul 17, 2024 at 2:20
Error concerning projectile motion in respected textbook?
Awarded Jul 9, 2024 at 21:06
Topological Charge. What is it Physically?
Awarded Jul 6, 2024 at 6:27
How does gravitational lensing account for Einstein's Cross?
Awarded Jun 20, 2024 at 13:31
Explain to a non-physicist what goes wrong when trying to quantize gravity
Awarded Jun 12, 2024 at 6:33
Why are spherical shapes so common in the universe?
Awarded Jun 7, 2024 at 13:05
How many photons are received per bit transmitted from Voyager 1?
Awarded Jun 3, 2024 at 13:19
Why do we think there are only three generations of fundamental particles?
Awarded May 26, 2024 at 13:42
Hilbert space vs. Projective Hilbert space
Awarded May 13, 2024 at 22:20
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