Recent content by lazyluke

well... yes... but i solved it using int(exp(-ax^2)dx=(pi/a)^(1/2) and int(x^2*exp(-ax^2)dx=1/2(pi/a^3)^(1/2) which i believe yields the same output... I kind of understand the logic here... thanks for the tip as this will be easier then memorizing the common integrals :]... the only problem now...

Ok, I don't know any U-sub, it will help to know about it anyway- but i understand if you don't want to give me a straight answer to my problem- maybe after monday you can tell me how to do that the "easy way", now I am going through that mess and I am left with something like this...

Sorry just came to me: Can I use: <p^2>=m^2*(d^2(<x>^2)/dx^2) or it doesn't work like that? nvm...<x>=0 :(

Homework Statement Hi, The problems asks to calculate multiple things for a Gaussian wave packet. Steady state function: psi(x,0)=A*exp(-ax^2).My problem is that I'm stuck at calculating <p^2>.Homework Equations <p^2>=Int(|psi|^2*(-1*h^2*d^2/dx^2))dx or...

Thanks to johnster08 as only he answered to my 1 out of 3posts...thnx guys, i don't think ill be here too aften...cya

Am i even in the right department with those questions?

Ok, so i came up with this using the Jacobian, but how do i get the scalar factors?, i assumed from Jacobian that hz=1 i donno if that is a legit assumption, please help. ThatYou Luke http://img444.imageshack.us/my.php?image=picture005up7.jpg

http://img262.imageshack.us/my.php?image=picture003dk1.jpg http://img510.imageshack.us/my.php?image=picture004ew8.jpg Thats what i came up with, i have a feeling its incorrect since the whole thing came to 0...pls can someone look over that? thank You Luke

Thank you, how do you derive that do u know?... is there a general formula for all coordinate systems to egt the scalar factors?... i don't need it for this part but the other question...and is my solution any close to be correct? (link to the file at the bottom of the post)

Homework Statement I have a question to find Scalar factors of parabolic cylindrical coords and element dV with provided tranformation equations. I know the values for both of them and that the product of the scalar factors is the dV, but how do i derive those scalar factors? I don't even know...

Homework Statement 2. Verify the divergence theorem for the vector field: F =(r2cosθ) r +(r2cosφ) θ −(r2cosθsinφ) φ using the upper hemisphere of radius R.Homework Equations Is this any close to be correct? The question marks indicate parts I am not sure about please help. Anyone know what are...

Homework Statement 1. The expression F = [x,y,z] defines a vector field. Given the parametric representation of a surface S:[u cos v, u sin v, u^2] = r (u,v), where the parameters cover the ranges 0 ≤ u ≤ 2 and 0 ≤ v ≤ 2π, calculate the flux F through the surface S.Homework Equations How do i...