Recent content by QuarkyMeson

Yes, that's basically it.

Try it for yourself, the rest case has C = 0. The initial rest condition is then essential to the claim of periodicity. For arbitrary initial velocities, the conserved momentum associated with the cylinder's rotation doesn't need to vanish. This introduces a uniform rotational drift, so the...

So we just did a similar problem for my graduate mechanics exam. If you didn't start from rest motion of the system need not be periodic, the large cylinder and the small disk can acquire a uniform rotational drift or I made a grave error. Here we're just kind of lucky that the initial...

You can't disprove something that doesn't make testable predictions to begin with lol. A fixed future also isn't incompatible with the born rule. The only thing that article does is it give a mathematical clarification of an existing problem, and only really interesting to maybe Everettian...

An oral drug is absorbed through your mucosa -> mostly small intestine -> travel via portal vein to liver -> where they undergo first pass metabolism and go systematic. They don't have to cross the blood brain barrier at all, and many don't. A random fun fact, you have a sort of similar thing...

There are two separate questions: https://en.wikipedia.org/wiki/Pharmacokinetics_of_estradiol This covers the pharmacokinetics. The compound is metabolized and eliminated like any drug, reaching approximately steady-state concentrations with repeated dosing. If this wasn't the case then one...

I base it on the reality of the education received and the emphasis of what that education focuses on. Griffiths level emag won't prepare you for roles in electrical engineering. Not only do electrical engineers also take roughly equivalent junior level E&M but they also have specific design...

Physics is not a professional degree. A terminal bachelors in physics isn't going to explicitly open many more doors that weren't already opened for you. Someone should have told you this, but I find a lot of people will paint a very rosy and unrealistic picture of what a bachelors in physics...

Is there any reason to actually care? People have been faking video and images since time immemorial. Rather than trying to watermark every fake, it would be easier to authenticate original recordings. A camera could cryptographically sign its output using a private key (4 of course), allowing...

We started with Sakurai. As far as I've been told there were only two options the professor was considering, Shankar and Sakurai. He choose the latter. I've heard others start with Griffiths, but his book seems universally loathed at my university.

Nice. We're using Ballentine for my grad QM course next semester. It will be interesting to take another go at QM when I'm also not trying to learn new notation and merely treading water for the exams.

You start with classical mechanics. In the Hamiltonian formulation, the state of a system is a point in phase space, given by position and momentum. Then you start seeing parallels between the classical and quantum descriptions. The Poisson bracket ##\{x, p\} = 1## becomes the commutator...

Stress and strain are related through constitutive equations, and either can be prescribed depending on the boundary conditions. Your thermal expansion example demonstrates that constrained thermal strain generates stress, not that strain is the cause of stress. Your conclusion does not follow...

This is just a malformed question. A dimension is a coordinate direction in spacetime. We can reach energies sufficient to test certain extra-dimensional models, and experiments already place bounds on their parameters. However, not all such theories are accessible at current accelerator...

An interaction does not necessarily cause a wavefunction to collapse into a definite state. Interactions can produce entanglement with the environment, potentially leading to decoherence. Measurements can also be partial or weak, extracting limited state information without completely resolving...