Recent content by define_normal

Homework Statement According to classical physics, a charge e moving with an acceleration a radiates at a rate dE/dt = - (e2a2)/(6pi epsilon c3) a) Show that an electron in a classical hydrogen atom spirals into the nucleus at a rate dr/dt = - e4/ (12pi^2 epsilon^2 r^2 me^2c3) b) Find...

We don't understand how we're supposed to integrate. Isn't there an R^2 in the bottom?

Homework Statement A wire carries a current of 30A along the x-axis from x = 0 to x = 3.0 cm. Determine the magnitude in uT of the magnetic field at the point y = 4.0 cm on the y-axis. Homework Equations dB = (u/4pi) ((Ids x r)/r^2) The Attempt at a Solution We tried using this...

Hmm. So in order for me to do that, I don't need to know the charge of the third particle?

Homework Statement Two small beads having positive charges 3q and q are fixed at the opposite ends of a horizontal, insulating rod, extending from the origin to the point x = d. A third small bead (in the middle) is free to slide on the rod. At what position is the third bead in equilibrium...