Thank you chiro for the quick response.
I am afraid I don't know what you mean. Wouldn't I just obtain the usual
x=r\sin{\theta}\cos{\phi}
y=r\sin{\theta}\sin{\phi}
z=r\cos{\theta}?
Also, I want \hat{k} to be a unit vector, which gives me r=1. How do I take this into account, when...
Hi guys,
I've run across a problem. In finding the potential energy between two electrical quadrupoles, I've come across the expression for the energy as follows:
U_{Q}=\frac{3Q_{0}}{4r^{4}}\left[(\hat{k}\cdot \nabla)(5(\hat{k}\cdot \hat{r})^3-2(\hat{k}\cdot \hat{r})^2-(\hat{k}\cdot...
For the last step in the derivation of the Gross-Pitaevskii equation, we have the following equation
0=\int \eta^*(gNh\phi+gN^2\phi^*\phi^2-N\mu\phi)\ dV+\int (N\phi^*h+gN^2(\phi^2)^*\phi-N\mu\phi^*)\eta\ dV,
where \eta is an arbitrary function, g,N,\mu are constants, h is the hamiltonian for...
Homework Statement
Given a vector field \textbf{F} and a composite (with this I mean cuboids, cylinders, etc. and not spheres for example) surface S, how do I calculate the flux through only some of the sides of S? I am interested in a general way to do this, but right now I am struggling with...