Recent content by catsonmars

Electric force inside a cylinder(my friends and I can't solve this:( Homework Statement A right circular cylinder has radius R and length L, and a nonuniform volume charge density ρ(\hat{r}). If the z axis is chosen to coincide with the axis of the cylinder, the charge density is ρ(\hat{r})...

R is just (x^2+y^2+z^2)^1/2 and it isn't a vector. Let me rewrite A A=( x^2 + y^2 + z^2 ) (x\hat{x} + y\hat{y} + z\hat{z} )

Homework Statement So I am not sure how to multiply these two (A*R^2) together. Homework Equations A=( x^2 + y^2 + z^2 ) (xe + y e + z e ) Where x represents the three vector compones I also have R^2=x^2+y^2+z^2 The Attempt at a Solution Is the product of A (x^3e + y^3 e + z^3...

Homework Statement Use the Poisson distribution W=(λ^n/n!)*e^-λ to calculate <n> Homework Equations <n>=ƩW*n The Attempt at a Solution Since W = (λ^n/n!)*e^-λ I wind up with <n>=[(λ^n/n!)*e^-λ]*n But I really don't know where to go from here. Should I do a Taylor Series. I've...

Hi, so I'm a junior pursuing a B.S in physics but I'm thinking that might not be enough to make me competitive. So I am thinking about minoring in mechanical engineering to make me more competitive. The thing is I'm not sure if it will even matter in the job market. I want to wait a bit to...

There should be more x values than ϕ's because the range of ϕ is much smaller than x. Second I'm still not sure how I should right the summation. I have ϕ=(Ʃw(ϕ)dϕ)/(P(x)(dx)) but that still seems wrong. I've also thought about relating ϕ+dϕ to x+dx somehow but I'm can't think of what would...

I am pre studying for Statistical Mechanics class in the fall and need help with this problem. I’ve already spent some time with it. Let the displacement x of an oscillator as a function of time t be given by X=Acos(wt+ϕ). Assume that the phase angle ϕ is equally likely to assume any value...