Recent content by forceface

When I try your suggestions I come up with B dv/dt = dB/dt v. But I am still not sure how this along with the intergral identity helps show what I want.

Homework Statement An electron with speed v, undergoing cyclotron motion in a transverse magnetic field B(r) at cyclotron radius r0, given r0 = mv/[eB(r0)], can be accelerated by ramping the B field in time. (a) Since magnetic fields do no work,what is increasing thwe kinetic energy of the...

Homework Statement Two pucks of mass m slide freely on a horizontal plane. They are connected by a spring (constant k and negligible un-stretched length) and set in circular motion with angular momentum L. The pucks are given a small, simultaneous radial poke. What is the frequency of...

So in other words this is the J/Psi particle.

I was reading the paper about the discovery of the first e+e- narrow resonancehttp://prl.aps.org/abstract/PRL/v33/i23/p1406_1 and one question that came to my mind, which was why was this discovery important. In my naive understanding I would believe that this pair annihilation could happen...

Homework Statement The problem is stated on page 10 and it is number 9. http://panda.unm.edu/pandaweb/graduate/prelims/QM_F11.pdfHomework Equations I know how to write Sy in the z basis for either spin up or down and I have all the spinors.The Attempt at a Solution I tried solving for |ψ(t)> by...

Well if u(r) is defined at u(r)=r*R(r), where R(r) is the radial part of the wave function, what are the units of R(r)?

This clears it all up, thank you. I was getting caught on the units of u(r) because I was thinking that it was not dimensionless but infact it is. So the idea behind this problem to convert everything else in this equation into dimensionless variables and then from that a relation can be...

Homework Statement The problem is number three (page 3) on the following link.http://panda.unm.edu/pandaweb/graduate/prelims/QM_S12.pdf I was going to type it out but it got too messy. 2. The attempt at a solution What I want to know is the relevant unitless variable substitution that...