Recent content by forrealfyziks

Today I had a materials lab where we looked through various properties of materials. One of the materials we had was alumina, and we had to describe how it was both thermally conductive and electrically resistive. I couldn't figure out the answer on my own. Could anyone describe the reasoning...

I used the pythagorean relation, and it does indeed become quite troublesome. Ill try my best to keep this as clean as possible. With the assumptions that William has made (which to my novice knowledge is correct), the conservation of Energy states E(lamb) = E(pro) + E(pion). Utilizing the...

yes it was supposed to be photon's new momentum. Guess I should have put that second part of the question in, but I didn't think it was necessary. Going back over the derivation of Compton's formula, I noticed it was almost the exact thing I was doing. heh, well thanks again.

I found out from a peer that the momentum you are finding is actually the photon's second momentum, and that you should solve in terms of po. It became incredibly easy once I knew I wasn't looking for something numerical... Thank you so much for your help!

I think I'm supposed to find p numerically, because the second part of the question asks you to verify your answer in part a using Compton's formula where \Theta=\pi.

Thank you for the hints it has really helped. I worked through the things vela posted, and found myself stuck again, though. If I add the two equations, I end up with (po2c2+p2c2)=Ee2-Eemc2 If I subtract the second from the first -2ppoc2=-Eemc2+(mc2)2 On the first one, it obviously has the...

"high school" algebra -> relativistic conservation of momentum and energy Homework Statement Consider a head-on, elastic collision between a massless photon (momentum po and energy Eo) and a stationary free electron. (a) Assuming that the photon bounces directly back with momentum p (in the...

"basic high school" algebra, with physics Homework Statement Consider a head-on, elastic collision between a massless photon (momentum po and energy Eo) and a stationary free electron. (a) Assuming that the photon bounces directly back with momentum p (in the direction of -po) and energy E...

eh I was up all night doing this so it was no doubt the fatigue, but I got to that point once and gave up(talking to gabba). I haven't been taught the four-momentum process so I can't use it unfortunately. Thanks you!

Homework Statement The positive pion decays into a muon and a neutrino. The pion has rest mass m=140 MeV/c^2, the muon has m=106 MeV/c^2 while the neutrino is about m=0 (assume it is). Assuming the original pion was at rest, use conservation of energy and momentum to show that the speed of the...

Thank you very much, I believe I was able to figure it out.

Homework Statement A lambda particle decays into a proton and a pion, and it is observed that the proton is at left at rest. A. What is the energy of the pion? B. What was the energy of the original lambda? (The masses involved are m_{}\lambda = 1116, m_{}p = 938, and m_{}\pi = 140, all in...