Recent content by Warr

The 'desired' application is a SAW (surface acoustic wave) transducer, which in reality looks like this: http://www.sp.phy.cam.ac.uk/SPWeb/research/HFSET/Research/Background/content_files/schematic_transducer.jpeg" This is actually for a thesis-like project where no experimentation is...

Hi I have a problem I'm trying to figure out, but no idea where to start. Essentially I am trying to calculate the amount of force required to imprint 'photoresist' (a very viscous fluid sensitive to light) of some known density, \rho and viscosity, \mu, with a ridid stamp, given a certain...

The way I see the mind is a kind of unfathomably complex cavern, and that free will at the level of thought simply doesn't exist. There may be uncertainty at he quantum level which leads to inherent unpredictability, but I believe that if you knew enough variables about a brain at any given...

Homework Statement Use the shell model to find reasonable configurations for the first 5 excited states of O-15. Homework Equations The spin-parity and energy above the ground state for the first five excited states are: ground state: (1/2)- excited states: 5.18 MeV, (1/2)+ 5.24 MeV...

Alright, thanks again.

What I meant is, can it have either (5/2)-, (3/2)- or (1/2)- ?

One further question for this example: Since the resulting j_P = 2+ and j_P = 3/2- can result in (2-3/2)=(1/2)-, does that mean they can result in the range (5/2)- to (1/2)- ?

Sorry about the 2x post. I posted here first, and then figured this might not be quite suitable in the homework forum. Thanks for the answer though.

I am confused how to determine the spin / parity of excited states. In my textbook, one of the questions states: ------------------------------ The ground state of the radioisotope 17-F-9 has spin-parity j_P = (5/2)+ and the first excited state has j_P=(1/2)-. Suggest two possible...

I am confused how to determine the spin / parity of excited states. In my textbook, one of the questions states: ------------------------------ The ground state of the radioisotope 17-F-9 has spin-parity j_P = (5/2)+ and the first excited state has j_P=(1/2)-. Suggest two possible...

Alright. I'm having a little trouble getting started on this design of an interferometer. Essentially what I want is to couple a laser into the single mode fiber (SMF), which is fusion spliced to a multi-mode fiber (MMF). Assuming the fiber is unperturbed, the modes will not mix and you will no...

Thanks, I got it to work out now.

I don't really know anything about 'Heisenberg representation'...this is homework too, so it would probably be pointless to figure out since we aren't expected to know it.

I am trying to show that \frac{d}{dt}<x^2>=\frac{1}{m}(<xp>+<px>)....(1) With the wavefunction \Psi being both normalized to unity and square integrable Here is what I tried... <xp> = \int_{-\infty}^{\infty}{\Psi}^*xp{\Psi}dx <px> =...

First off, the photoelectric effect is not part of the problem at all. The energy gained by an electron moving through a 1 volt potential is 1 eV (electron volt). So then how much energy is gained moving through a 25,000 V potential? Also a constant may be useful is the rest mass of an...