A large pipe (diameter = 0.080m) is coupled by a watertight fitting to a smaller pipe (diameter = 0.025m). If the water velocity in the large pipe is equal to 0.50 m/s, what is the water velocity in the small pipe? Choices:
-3.7 m/s

-4.4 m/s

-5.8 m/s

-5.1 m/s

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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?