Recent content by arhanbezbora

Large enough? How large would the pressure gradient need to be? Thanks

Can sonic velocity be achieved in a short pipe with constant cross-section, assuming isentropic flow with no viscous effects being taken into account? Thank you.

Hi, Do sound waves experience a redshift similar to that of light in a gravitational field? Does anyone know the equation governing the change in frequency of the sound? Is this the same as the Doppler shift for an accelerating source of sound? Thanks.

What would be the effect on a choked mass flow rate if there were fluctuations in the downstream pressure? Thanks

Gas Flow into Vacuum Paradox ?? Hi, I've just been reading up on 1-D isentropic, compressible flow through a nozzle (constant cross-sectional area) and have hit a bit of a conceptual road block which I was hoping someone would help resolve. I'm interested in the mass flow rate of the gas...

yea, I am a little confused as to how the canonical commutation relation allows a quadratic potential to have coherent states?

Does anyone know why a harmonic potential gives rise to coherent states? In other words, what is special about a quadratic potential that causes the shifted ground state to oscillate like a classical particle without dispersing so as to saturate the uncertainty principle? Any help or insight...

Hi, does anyone know of a good resource that focuses on the history of the harmonic oscillator and other classical systems like the vibrating string and vibrating drum? I need to talk about the historical aspect in a project and was having a hard time finding some good material. anyway let me...

ok thanks, i have the feynman lectures so ill read up on it :)

Hi, I was just reading feynman's nobel lecture the other day ("The Development of the Space-time view of qed") where he discusses the problems associated with his initial view that an electron does not act on itself but merely acts on other electrons. He talks about the "force of radiation...

hi, i was wondering if there were any websites or any links that talked about performing the photoelectric effect for an undergraduate lab? i have to come up with a proposal for an experiment and i was considering the photoelectric effect but didnt really know what would be needed in terms of...

oh i see...i made a mistake in reading it and interpreted it as being true for some function g rather than for every function belonging to C(infinity). thanks a lot you guys.

I was just going through the derivation of the euler - lagrange equation that rests on the proof of the fundamental lemma of the calculus of variations which states the following: If a function g(x) vanishes at the endpoints i.e g(a) = 0, g(b) = 0 and is continuously differentiable within...