As the wavelength of an electromagnetic wave goes up, what happens to the frequency?
a. nothing
b. it goes up
c. it goes down
d. it depends on the wave

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ft⋅lbflbm⋅r(1 psia144 lbf/ft2) = 0.3704 psia⋅ft3lbm⋅r the amount of air that must be added to raise the pressure is lbm

What is an electric motor? explain its operation. 2-3 sentence