Recent content by cfitzU2

Does no response mean this is really easy or no one knows it? Because I haven't been able to find a similar issue... :(

PROBLEM: I am asked to consider a parallel polarized planar wave with frequency ω is normally incident on a dielectric boundary. The incident time average power flux P_i = 100 w/m^2. The first medium is free space and the second has vacuum permeability but ε=4ε_0. We are also given that the...

Hello friends, So I have a point charge with mass m and charge +e entering a uniform magnetic field B at velocity v from the "right". The field is perp to the velocity pointing "in", so I see that eventually this particle reaches a steady state of uniform circular motion (counter clockwise)...

Wow. Thanks so much. I am an absolute fool. By symmetry deduce that resultant for each string is 10. Then since horizontal components cancel just add vertical components to get 2*10*sin(45) = 20/sqrt(2) apprx 14.1. Similar calculations show that 30 degrees gives 10, so (a) is 1>3>2...

1. Homework Statement "Three situations involving a block with a weight of 20.0 N and a string are shown in the figure above. In case 1, there is only one string leading from the hook to the ceiling. In cases 2 and 3, the string passes through a hook on top of the block. [What the picture...