Recent content by OGrowli

I'm working on a project that involves a Joule thief. I need to model the magnetization process of the ferrite core of the toroid. With that I will be able to get an accurate picture of the flux change, which I can use to predict the induced emf based on the characteristics of the system...

I wasn't sure where to put this question. Can anyone tell me what method LineFit uses to perform linear regression with error in both coordinates? Thank you.

cool, thank you.

The 10 per cent is being converted into heat. This is energy that the car is unable to use. There is nothing in physics theory that forbids getting very close to 100 per cent efficiency, But, In most cases, it is difficult to do achieve in practice.

Homework Statement I'm trying to estimate the error in measurements of a homogenous magnetic field of known orientation using a Gauss-meter that uses a Hall-effect probe. The uncertainty in the measurements reported by the Gauss-meter are given the user's manual. Since the probe is held by...

Your post was a bit hard to follow, but I think what you are asking is along the lines of : If energy is neither created nor destroyed, why isn't all the energy put into conversion system such as a motor or an engine converted? Where does the lost energy go? Energy conservation is a real...

Does anyone know what is wrong with the LaTex coding here?

We're asked to derive the following equation: F=\triangledown(\vec{m}\cdot \vec{B}) by evaluating F=\int I(d\vec{l}\times \vec{B}) along a sqaure loop with sides of length ε, parralel to the yz plane. The square's bottom left corner is situated at the origin. so far I have, d\vec{l}...

(a) Obtain the ground state wave function and energy. Draw the wave function \psi_{1}(x) (how many nodes are there in the ground state?) and the probability \left | \psi_{1}(x) \right |^{2} of finding the particle in dx about x. V(x)=\begin{cases} & \infty,\text{ }x \geq a, x\leq -a \\...

nvm, I got it: =\frac{-i\hbar}{2m}\int_{V}d^3r\psi ^*[\frac{\partial }{\partial x} (x^2\psi'+2x\psi)-x^2\frac{\partial^2 }{\partial x^2}\psi] =\frac{-i\hbar}{2m}\int_{V}d^3r\psi ^*[x^2\frac{\partial^2 }{\partial x^2}\psi+2x\frac{\partial }{\partial x}\psi+2\frac{\partial }{\partial...

i don't know what happened to my original post, but I am having an issue with the following problem: Show that: \frac{d}{dt}<x^2> =\frac{1}{m}(< xp_x> +<p_xx>) for a three dimensional wave packet. relevant equations: Ehrenfest Theorem:(1) i\hbar\frac{d}{dt}<O>=<[O,H]>+i\hbar<\frac{\partial...