Recent content by Bkkkk

Specifically I was referring to an x-factor style selection. So there are 200,000 who initially attend auditions. In auditions the number of candidates is reduced to 12 from the original 200,000 by the x-factor producers and judges. The rest of the competition uses a combination of judges and...

I was wondering is there any way to quantify how much "power" a given selection has on the final outcome of a voting. More specifically, say you have a sample 330,000 people and you need to pick one. However, before you get to make a choice a pre-selection is applied and the sample is narrowed...

Need help with a horrible integral! Dont get scared Homework Statement Prove that Homework Equations Cosh2-Sinh2=1 The Attempt at a Solution I have used the subsitution r=2GM/c2Cosh2(x) and the integral is simplified to: 4GM/c2*\intCosh2(x)dx Integrating was done in...

I agree with most comments made, Boas is a GREAT book to have for a University level course in physics, I am a second year Physics undergrad and this book along with Jordan and Smith has everything I need for the first and second year math courses. But I do agree that for a HS it might be a bit...

Sorry, could you specify which integral you are referring to? I realize that the distribution of velocities follows a maxwell-boltzmann distribution, neither the RMS, mean or Most probable velocity result in the correct answer, the only one which comes close is the Mean velocity with 2.5kT.

Electron "oven" In S-G Experiment This isn't so much a homework problem but I guess it fits more here then in the other areas of the forum. Whilst we were deriving and expression for the deflection of particles in the Stern-Gerlach experiment, the lecturer stated that the particles emerge...

Thanks everyone, I managed to get the other eigenvector, there is only one from the repeated L=1 so it was straight forward. Thanks again.

Yes, sorry I meant the polynomials solution. So all I have to do now is put the value for lamba back into Matrix B, multiply by the column matrix, make that equal to zero and work out the values of X, Y and Z.

Oh I hate when that happens! SO then The final solution is (x-1)(x-1)(X-4)

He this is the determinant as I set it up (1-X){[(2-X)(3-X)]-2}-2{[(-1)(3-X)]+2}+{[(-1)(-2)]-[(2)(2-X)]} (1-X){[6-5X+X^2-2}-2{X-1}+{2-4-2X} (1-X){[-5X+X^2+4}-2X+2-2-2X (1-X){-5X+X^2+4}-2X+2-2-2X -5X+X^2+4+5X^2-X^3-4X-4X -13X+6X^2+4-X^3 Completely different but still wrong.

Homework Statement Given Matrix B: [FONT="Courier New"] [ 1 2 1] [-1 2 -1] [ 2 -2 3] and knowing that one of the Eigenvalues is 4, find one other value and its corresponding eigenvector Homework Equations Bx=Lx (The basic idea behind eigenvectors) det(B-LI)=0 The Attempt...