Recent content by patapat

So I'm staring at this equation in my book and I am not sure what the variable k represents in this equation: E=(p^{2}/2m)-(ke^{2}/r) and I am assuming e refers to the charge of the electron.

I had a feeling there was no simple answer, thanks guys.

I was reading about time dilation and say if we have an inertial S that moves with velocity v in the x-direction with respect to an inertial frame S'. In S' we shoot a light towards a mirror and measure the time from when the original flash takes place to when it returns to it's origin giving us...

So I'm looking at some Lorentz transformation equations and it says x'=\gamma(x-vt) t'=\gamma(t-vx/c^{2}) y'=y z'=z I'm assuming the values for y', y, z' and z only hold true when the inertial frames of S and S' are moving at a relative velocity in the x-direction. With this being said, what...

Homework Statement A hydrogen atom at rest in the laboratory emits the Lyman radiation. (a) Compute the recoil kinetic energy of the atom. (b) What fraction of the excitation energy of the n = 2 state is carried by the recoiling atom? (Hint: Use conservation of momentum.) Homework...

from your equations I am getting: E=\gammamc^{2} E=\sqrt{p^{2}c^{2}+m^{2}c^{4}} \gammamc^{2}=\sqrt{p^{2}c^{2}+m^{2}c^{4}} take out c^{2} \gammamc^{2}=c\sqrt{p^{2}+m^{2}c^{2}} cancel c \gammamc=\sqrt{p^{2}+m^{2}c^{2}} Am i correct so far? and if so where should i go from there?

im not sure what you mean by conservation of four-momentum.

So when you say that the energy is expressed in two ways then do you mean that they are equal to each other?

Is energy in this case some factor of \gamma or is it kinetic energy? I'm referring to gamma as 1/\sqrt{1-u^{2}/c^{2}}.

I'm guessing that the conservation of energy and momentum is interrelated in this problem, so I'm not sure how to combine the two. In other words, I'm not sure how to express the mass in terms of both the conservation of energy and momentum.

it should be V_0 not V^0, thanks.

Homework Statement When light of wavelength 450 nm is shone on potassium, photoelectrons with stopping potential of 0.52 V are emitted. If the wavelength of the incident light is changed to 300 nm, the stopping potential is 1.90 V. Using only these numbers together with the values of the speed...

Homework Statement Determine the fraction of the energy radiated by the sun in the visible region of the spectrum (350 nm to 700 nm). (Assume the sun's surface temperature is 5800 K.) Homework Equations R=\sigmaT^{4} for some reason i can't make the sigma come down, but it's a...

Thanks, that helps. Would you mind telling me how you made those vector notations?

Homework Statement Consider a particle of mass m traveling at speed v in the positive x direction. It splits into two pieces which travel in the x-y plane with velocities v1(vector)=v1cos(theta)x(hat) + v1sin(theta)y(hat) and v2(vector)=v2cos(phi)x(hat) - v2sin(phi)y(hat). a. Find the masses...