A harmonic longitudinal wave propagating down a tube filled with a compressible gas has the form s(x, t) = sm cos (kx - wt). Its velocity can be obtained from
a. w/k
b. k/w
c. k
d. w
e. wk
Question 2
Two organ pipes, a pipe of fundamental frequency 440 Hz, closed at one end, and a pipe of fundamental frequency 660 Hz, open at both ends, produce overtones. Which choice below correctly describes overtones present in both pipes?
a. After the first overtone of each pipe, every second overtone of the first pipe matches every second overtone of the second pipe. b. After the first overtone of each pipe, every second overtone of the first pipe matches every third overtone of the second pipe. c. After the first overtone of each pipe, every third overtone of the first pipe matches every second overtone of the second pipe. d. After the first overtone of each pipe, every second overtone of the first pipe matches every fourth overtone of the second pipe. e. After the first overtone of each pipe, every third overtone of the first pipe matches every fourth overtone of the second pipe.
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