A human wave. During sporting events within large, densely packed stadiums, spec

Question

A human wave. During sporting events within large, densely packed stadiums, spectators will send a wave (or pulse) around the stadium (the figure). As the wave reaches a group of spectators, they stand with a cheer and then sit. At any instant, the width w of the wave is the distance from the leading edge (people are just about to stand) to the trailing edge (people have just sat down). Suppose a human wave travels a distance of 855 seats around a stadium in 44.9 s, with spectators requiring about 2.10 s to respond to the wave's passage by standing and then sitting. What are (a) the wave speed v (in seats per second) and (b) width w (in number of seats)?please set answer a to three significant digits and answer b needs to be exact answer.

Explanation / Answer

855/44.9 = 19.04 seats/sec width = 19.04*2.10 = 39.984 seats

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