Apoint charge with charge q1 = 3.10 μc is held stationary at the origin. a second point charge with charge q2 = -4.50 μc moves from the point ( 0.140 m , 0) to the point ( 0.265 m , 0.265 m ). how much work w is done by the electric force on the moving point charge?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?