Recent content by qqchico

I looked through some books and couldn't find how to find curves of intersection between surfaces. My question asks: explain why the curvature between surfaces z=x^2 and x^2+y^2=4 is the same of intersection between the surfaces z=4-y^2 and x^2+y^2=4. please help i feel really dumb right...

the question asks consider a particle of mass m whose motion starts from rest in a constant gravitational field. if a resting force proportional to the square of the velocity (i.e, kmv^2) is encountered, show that the distance s the particle falls from vnot to v1 is given by s(vnot-> v1)=...

I have that too but i don't think the teacher would give such an easy question. thanks a bunch.

why are they called quadric surfaces?

nice examples

|1,1>\mapsto\left(\begin{array}{ccc}(e^(^-^i^\phi^)(1+cos\theta))/2\\(sin\theta)/\sqrt{2}\\e^i^\phi(1-cos\theta)/2\end{array}\right) |1,0>\mapsto\left(\begin{array}{ccc}-e^(^i^\phi^)(sin\theta)/\sqrt{2}\\(cos\theta)\\(e^i^\phi\sin\theta/\sqrt{2}\end{array}\right)...

we did some for spin 1/2 particles but it was rushed I've had to teach myself and there are no tutors for this since there are only 3 people at my school who have taken it me and 2 girls and they are as lost as i am. The way i did it was the way we did it for the spin 1/2

S= sin operator S*n for a spin 1 particle where Shat is equal to Sxihat+Syjhat+Szkhat and nhatis equal to \sin\theta\cos\phi(i)+sin\theta\sin\phi(j)+\cos\theta\\(k) multiply the together to get \sin\theta\cos\phi(Sx)+sin\theta\sin\phi(Sy)+\cos\theta\\(Sz) Sx=...

Anyone? I really need help this is due tomorrow.

When I solve the determinant i get 2\lambda-\lambda^3=0

Solve the eigenvalue problem Sn|\lambda>=\lambda|\lambda> for a spin 1 particle. Find the eigenvectors. I actually have the eigenvectors. I just need to show how to get them

\hbar/\sqrt{2}\left(\begin{array}{ccc}\sqrt{2}·COS(\theta)&e^(^-^\imath^\phi^)SIN(\theta)&0\\e^(^\imath^\phi^)SIN(\theta)&0&e^-^(^\imath^\phi^)SIN(\theta)\\0&SIN(\theta)e^(^\imath^\phi^)&-\sqrt{2}·COS(\theta)\end{array}\right )\left(\begin{array}{ccc}\(A&\\B\\C\end{array}\right)=\hbar/\sqrt{2}...

this is supposed to be a 3x3 matrices but it wouldn't fit

S*n=\hbar/\sqrt{2}\left(\begin{array}{ccc}\sqrt{2}·COS(\theta)&SIN(\theta)·COS(\phi) - iSIN(\theta)·SIN(\phi)&0\\SIN(\theta)·COS(\phi) + i·\SIN(\theta)·SIN(\phi)&0&SIN(\theta)·\COS(\phi) - i·SIN(\theta)·SIN(\phi)\\0&\SIN(\theta)·COS(\phi) +...

This is for a spin 1 particle. I can't get the determinant to come out right. Can someone show me what i am doing wrong