Most active questions

We all know from every day experience that if you touch metal that's been left outside in direct sunlight, it'll burn you. Why is that? I've read that it's related to the specific heat capacity and/or ...

After reading a number of posts here in the last few years I'm left wondering why most questions about the interpretation of quantum phenomena relate to quantum mechanics rather than the more modern ...

Is it theoretically possible for there to be such a thing as a "gas moon" as opposed to a rocky one? Do any laws or models specifically prohibit the formation of gaseous moons?

The thought experiment: Two spaceships are passing each other some distance from a star. Both ships are at relativistic speed, one toward and one away from the star. Should the total energy observed ...

In Sean Carroll's book on GR, in the very first chapter about SR, he mentions how the difference between Newtonian concepts of space and time, and the view put forward in SR is how there is an "...

Because of the Meissner effect, magnetic fields can only infiltrate superconductors as discrete flux tubes. Normally, a flux tube has two ends where magnetic fields enter and exit the superconductor, ...

I recently read about the Wu experiment, but I’m missing something about parity. As I understand it, basic EM would already violate parity. Apparently, it doesn’t, but I’m wondering e.g. what’s ...

You have an emitter at A and a reciever at B. Exactly half way between them is a star. The emitter simultaneously emits a burst of photons as well as a burst of moderatly high-energy neutrinos. The ...

As someone with a small background in physics, I find myself questioning the necessity of the ideal gas constant $R$ in the Ideal Gas Law $pV = nRT.$ Why can’t we simplify this relationship to $pV =nT$...

I find here: video 1 and video 2 that say that for acceleration is only important power not torque. Internal combustion engines have power and torque that vary with RPM. Power and torque are connected ...

Bell assumes that there exists a function $f$ which takes the hidden variable $\lambda$ and the setting of the measurement device : $\vec{a}$ or $\vec{b}$, as the input and gives the result of the ...

Elementary question but I'm slightly confused about the statement $$\vec{v} = \vec{\omega}\times\vec{r}.$$ I know that $\vec{\omega}$ is simply the time derivative of $\theta$, which, to make things ...

I understand that solar panels generate electricity by converting photons from sunlight. This made me wonder whether it would be possible to use other types of cosmic radiation, such as muons, to ...

I have been in discussion with folks about the last 10 mins of the MIT Lecture 2 - Quantum Mechanics course. Theorem. Given three propositional statements (about objects), A, B, C, and given a finite ...

This question about warning on a glass jar of food, to use wood / plastic spoons instead of metal because of a glass-break risk. How likely is that you would chip a glass jar without noticing and how ...