Recent content by kpou

\geqHomework Statement Find the Fourier Transform of y = exp(^{}-at)sin(\omega_{}0t) for t ≥ 0 and = 0 for t < 0 Find the amplitudes C(\omega, S(\omega), and energy spectrum \Phi' for \omega > 0 if the term that peaks at negative frequency can be disregarded for pos frequency...

bah, I just noticed the next question specifies an infinitely long solenoid. Maybe it wasn't just forgotten like I was hoping.

I am just going by what my book has written for the E equation. It does include \widehat{\eta}.

And the problem does not state it is infinite, I actually copied it word for word in case I missed something.

I'm sorry it is supposed to have a hat over it.

It is uniform I assume.

Homework Statement Find the force on a charge q a distance r > a away from a cylinder of charge with radius a. The cylinder has a charge density per volume \rho Homework Equations E(r)=\frac{1}{4\pi\epsilon_{0}}\int_{V} \frac{\rho(r')}{\eta^2}\eta[hat]d\tau' The Attempt at a Solution I am not...

The cross product is the normal vector of the plane.

Homework Statement Determine the vector in the direction field( in the form of < 1, ? >) correspond- ing to the given point. y' = 1 + 2ty at (2, 0), at (3, -2).Homework Equations The Attempt at a Solution y'-2ty=1 p(t)=-2t ; u(t)=e^(-t^2) e^(-t^2)-2te^(-t^2)=e^(-t^2)...

So you I fixed my calculator, problem solved ><

Homework Statement Two waves are produced on a string with length of 1m. Wavelength of one is .5m Wavelength of the other is .2m. Amplitude and velocity are the same. Show that 2Asin(7pi(x + vt)) cos(3pi(x + vt)). At t=0 what locations are the max/min displacement at? Homework...

Homework Statement Thermal Dynamics question, gases? So I have this box with lengths 20cm on each side. There are 100 balls inside of it with diameter 5mm each. The density in the box is 7.8 g/cm3. The bottom of the box vibrates so the balls bounce around. The top of the box has a movable...

what is the total number of photons to be emitted when all atoms have returned to the ground state? Assuming each transition is equally probable was what I was getting at seems just like an awkward probability problem tho

Is the ground state 1? If that is so, then the energy of 5-3+3-1 is the same as 5-1

I have not had a class on degeneracies and have had no mention of selection rules. From what I understand in the problem is that I will take the energy from each transition 5-4 4-3 3-2 2-1 and find the number of photons from that. Something else that sounds like it could be a "degenerate rule"...