Recent content by CoffeeCrow

Alright, thanks, I was just worrying I'd managed to miss something fundamental!

Homework Statement X-rays with wavelength 55pm are scattered from a graphite target. Consider an x-ray which is scattered from a valence electron at an angle of 180 degrees (back towards the x-ray source). a. Is the wavelength of the X-ray greater or less than before the collision? b. What is...

Oh of course! Thank you so much, I worked through the algebra again, removing all dr terms to the second or greater power and I came up with the provided solution exactly. I suppose I was just worried that I'd made a conceptual error about the electric field somewhere along the way.

I'm sorry, but why did you need to consider A and B rather than A and C? I figured I'd have to find the electric field due to A at a distance of 2r+dr, due to C at a distance of r-dr and sum them? Also why were you able to drop the subsequent dr^{2} terms? i figured that despite differential...

Homework Statement 1. Compute the electric field vector at the position of charge B for the case where q_{A}=4q_{C} and r_{1}=2r_{2} 2. Suppose that all three charge are positive and that q_{A}=4q_{C} . Consider the case where f q_{B} is moved to the right by a distance dr. Now r_{1} = 2r+dr...

Thank you! I've spent about an hour and a half on this and I was almost completely sure the solutions were in error, so thanks for confirming that, I really appreciate your help.

Homework Statement A helium-neon laser ( ##\lambda =633nm##), is built with a glass tube of inside diameter 1.0mm. One mirror is partially transmitting to allow laser light out. From an optical perspective, the laser beam is a light wave that diffracts through a 1.0mm diameter circular...

Thank you so much! I think I understand a lot better now (that was a lot more painless than expected).

Sorry, I accidentally hit enter half way through writing this

Homework Statement A solid sphere of mass M and radius a is released at vertical height y=R and rolls down a circular bowl without slipping, find an expression for the velocity of the sphere's center of mass at the bottom of the bowl. 2. Homework Equations ##I=I_c+Md^2## I=\frac {2} {5}...