1. Electrons are accelerated in the picture tube of a television through a potential difference of 8.00 x 10ºV. (Use the values qe=1.60 x 10-19 C and
me=9.109 x 10-31 kg.)

a. What is the change in the potential energy of each electron traveling in
this tube?

b. What is the change in the kinetic energy of the electrons?

c. At what speed do the electrons hit the screen?

An uncharged nonconductive hollow sphere of radius 18.0 cm surrounds a 12.0 µc charge located at the origin of a cartesian coordinate system. a drill with a radius of 1.00 mm is aligned along the z axis, and a hole is drilled in the sphere. calculate the electric flux through the hole.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

Three charge are arranged as shown in the diagram. the magnitude of the net electrical force acting on the +6 uc charge, rounded to the tenths place, is .