It was a dark and stormy night, when suddenly you saw a flash of lightning. Three and a half seconds later you heard the thunder. Given that the speed of the sound in the air is 340m/s, how far away did the lightning bolt strike? Give your answer in both meters and kilometers.

What is the angular momentum of the bar about the axle?

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/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?