Ecology. To measure the velocity v (in feet per second) of a stream, we position a hollow L-shaped tube with one end under the water pointing upstream and the other end pointing straight up a couple of feet out of the water. The water will then be pushed up the tube a certain distance h (in feet) above the surface of the stream. Physicists have shown that v2 = 64h. Approximately how fast is a stream flowing if h = 1 foot? If h = 0.5 foot?
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