Recent content by LeePhilip01

I just took the E of the two protons ( = 2 x mpc2 ) and subtracted the product of c2 and the momentum of the incoming proton, all squared. As in the invariant. The second part in the COM frame has no momentum so is just the sum of the E components. Is this wrong?

I'm also kind of stuck on this. So far I've got: BEFORE the collision: Using the invariant (E2 - c2p2) = (2mpc2)2 - c2(pp)2 Then AFTER the collision in the COM frame: (E2 - c2p2) = (mpc2+mpc2+m∏c2)2 Then to get the threshold I'm equating the two equations and solving for mpc2...

Got it all sorted now! Thanks!

Hi I'm sorry if this is posted in the wrong section or it's laid out wrong but I have a question that I need a bit of help with. Homework Statement I'm given: A spherically symmetrical charge distribution is contained within a sphere of radius a with no charge outside. At a distance r (r...

Lol ur right... I DO feel like the man...! Although it took me abt an hour lol... :smile:

Yes, however i wasn't sure whether they were important because they weren't given in th question. \beta = \frac{1}{V} . \frac{dV}{dT} \kappa = - \frac{1}{V} . \frac{dV}{dP}

Homework Statement Show that:- a) the expansivity \beta = \frac{1}{T} b) the isothermal compressibilty \kappa = \frac{1}{P} Homework Equations P\upsilon = RT where \upsilon = molar volume The Attempt at a Solution A big mess!