Ajetliner is traveling east from salt lake city to washington dc, a distance of 1,850 miles. the jetliner travels at an average air speed of 590 mph relative to the air. at the jetliner's altitude, the wind is blowing 36 mph to the west. how long does the journey take?

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?