vela's latest activity

I recently found this on facebook. It makes sense to me and addresses some common complaints on what one might study:

No, he's saying taking ##\hbar=m=1## is effectively the same as what I explained above about using the natural length scale for the...

Zettili is unfortunately using ##\hat X## and ##\hat P## to represent both the regular position and momentum operators in some contexts...

You might get the answer you're looking for, but that's by coincidence. It's not the correct way to solve your problem.

How are ##\beta## and ##k## defined? What are the conditions that must be met at ##x=W/2##?

Maybe research worthy of an Ig Nobel Prize?

Friction opposes the relative motion of two surfaces in contact. This can be actual relative motion (kinetic) or 'threatened' relative...

If your goal is to learn physics, you might want to hold off on focusing too much on the theorems and proofs at this stage and...

Oh, you were asking about the steps preceding that last step. Yeah, the OP isn't exactly forthcoming with his reasoning.

##F = -kr## implies ##\omega = \sqrt{k/m}##.

What precisely is stopping you from writing down an expression for ##U(r)##?

No. If you're treating ##y## as a constant, its derivative with respect to ##x## is 0.

Please forgive me, but this comment concerns me a little: "I would prefer she did something she truly excelled in." I recommend you try...

I'm inclined to agree with your reasoning and answer.

I think you're suffering from the problem every physics student seems to go through when first encountering quantum mechanics: you're...