Recent content by ihatelolcats

You are correct, the frequency is just w. And it should be ω^2 instead of t^2 in the denominator. So the answer to part b is changed to x=Acos(ωt)(1-k/(mω^2))-(gt^2)/2.

Thanks for the reply, the only thing that doesn't make sense is that you say "it is impossible to get a single wavefunction that extends infinitely through space" since it would take an infinite potential to stop a wavefunction completely. I first thought about all this when CERN announced the...

Mathematically they are set up so the wave extends instantly to infinity in all directions, right? What would break if you limited the "propagation speed" to c, so if a particle is created at a point in space it would have 0 probability of being detected outside a sphere expanding at c away from...

Homework Statement A mass, m, is attached to a support by a spring with spring constant, k. The mass is hanging down from the spring, so there is a gravitational force on the mass as well. Neglect any resistive or frictional force. The support is then oscillated with an amplitude of A and...

thanks for the information, that really cleared up a lot

i just learned that quarks are always paired with antiquarks, and i wonder what effect keeps them from turning into energy? is it some kind of quantum pressure? thanks

[PLAIN]http://img251.imageshack.us/img251/1050/quantume.png taken from http://quantummechanics.ucsd.edu/ph130a/130_notes/node338.html I see how psi_211 and psi_21-1 are eigenfunctions, because they are just 0. I don't see how they got the other two (+/-). Thanks in advance

the reason for making this thread was because i watched these videos :) thanks for all the responses

but isn't a particle just an idea? like the point in geometry i guess what I'm having trouble understanding is the divide between theory and reality is explaining how a system behaves the same as saying what the system is?

wow. thanks so much! :)

i'm not sure what you mean by expand in terms of Sy i have \chi = 1/sqrt(17) (\stackrel{4}{0}) + 1/sqrt(17) (\stackrel{0}{i}) Sy = \hbar /2 \stackrel{0}{i} \stackrel{-i}{0} where to go from here? i'm still going to have to take an expectation of something to get a probability... do...

sorry, it is the state the protons are in

Homework Statement A beam delivering protons is sent through a stern-gerlach splitter oriented to ask whether the spin is oriented parallel to the y axis. What fraction of protons have spin down with respect to the y axis? \chi=\stackrel{1}{\sqrt{17}} \stackrel{4}{i} the 4, i thing is the...