A 1800 kg car is parked at the top of a hill 4.7 m high. B. The car’s brakes fail and it rolls down the hill. At the bottom of the hill, what is the potential energy of the car?

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?