Arope is wrapped around the rim of a large uniform solid disk of mass 155 kg and radius 2.30 m. the horizontal disk is made to rotate by pulling on the rope with a constant force of 195 n. if the disk starts from rest, what is its angular speed in rev/s at the end of 2.05 s?

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?