Recent content by max8404

duh. thanks a lot! I got it now! :)

Hey Tiny Tim, thanks for your response, but I doon't quite get it. I understand the equation, E=KE+mc^2, but in this case, what would E be? Or am I once again looking at it the wrong way? Thanks!

Homework Statement Thanks for everyone that helped me with the physics questions! I had my physics 2 final today and got a 94! There was a question that I could not figure out for a long time. It goes like this. What would the velocity of the photon be if the Kinetic energy of the photon...

excellent! thanks for your quick response. Now, to continue studying for this nasty final! :)

simple cross product question. Please help! Homework Statement Hey guys, I know how cross product works, i-->j-->k : positive numbers i<--j<--k : negative number Homework Equations The question that I have is, say I have -k x -i, I am supposed to get a positive j since the two...

Hey, thanks a lot for this explanation, I really appreciate it! :)

Thanks for your reply, but I don't really understand what you are trying to say with the first sentence. I think I took everything you said in consideration, but the equation that I wrote is wrong since I am getting a negative number for my wavelength, and the wavelength is too small anyways...

I have worked on this problem for about an hour, looked through the book lots of times, and honestly just don't know how to get it done. So I am here with all you fellow physicists for help! :) Homework Statement X rays bombarding heavy atoms can be used to eject electrons from the 1s shell...

yeah, that's right. I just did 1/2mv^2=kq1q2/r and it all worked out. Thanks!

Okay, so I understand correctly, what you are saying is that kinetic energy will have to be stronger than the electrostatic, i.e. it will have to do work. So the second part of the equation that you provided, after the W, would seem to be the correct structure. I am assuming that q1 would then...

Hey Guys, so here is the problem. Homework Statement Find the speed an alpha particle requires to come within 3.4 × 10−14 m of a gold nucleus. Coulomb’s constant is 8.99 × 109 N · m2/C2, the charge on an electron is 1.6 × 10−19 C, and the mass of the alpha particle is 6.64 × 10−27...