A horizontal beam of light is reflected from a plane mirror that revolves about a vertical axis at a rate of 30 rev/min. The reflected beam sweeps across a screen that, at the point nearest the mirror, is 20 m away. With what speed does the spot of light move across the screen at the point...
I need help with these two questions:
1. A particle of mass 'm' and charge '-q' moves in a circular radius 'R' about a fixed charge 'Q.' The angular frequency for the orbit is given by
A uniform magnetic field of magnitude B is in the direction perpendicular to the...
calc 3 easy question!
I am trying to find the partial derivative of the following function with respect to y. I know how to find it without using the definition...but i want to know how to do it both ways. any help??
I got: lim as h approaches h...
The question says that charges are distributed with uniform charge lambda along a semicircle of radius R, centered at the origin of a coordinate system. What is the potential at the origin?
I am not sure how to approach this one. Can anyone help me set this up and solve it? Thanks!
can someone help me out with a simple calc question?
we are asked to find the limit of a function as t approaches zero. the function is:
(sint/2t)i + (e^2t)j + (t^2/e^t)k
why is the answer not just j?
the answer given is 1/2i + j, but I have no idea how that first term came about...
Can someone help with this? I want to say the answer is zero but I don't know how to explain it.
Calculate the electric field at the origin due to the following distribution of charges: +q at (x,y)=(a,a), +q at (-a,a), -q at (-a,-a) and -q at (a,-a).