Two Charged parallel plates are 1.5 cm apart. The magnitude of the electric field between the plates is 1800 N/C. What is the electric potential difference between
the plates? How much work is required to move a proton from the negative plate to
the positive plate?

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.

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?