Aleaf falls from a tree. as you are watching the leaf fall, how can you tell that it has reached its terminal velocity?
a. the leaf is accelerating.
b. the leaf hits the ground.
c. the leaf is experiencing a force.
d. the leaf is falling with a constant velocity.

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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?