Question

An organ pipe open at one end has a length of 60 cm. If the speed of sound in air is 340 m/s, what is the lowest frequency produced by the organ pipe?

A) 141.5 Hz
B) 283 Hz
C) 70.8 Hz
D) 610 Hz
E) 305 Hz

A) 141.5 Hz
can anybody show me how to do this? not just the answer?
closed end – node
open end - antinode
=> A quarter of the wavelength is on the length of the pipe =>
λ=4L=4•0.6 = 2.4 m
λ=v/f
f=v/ λ=340/2.4 =141.5 Hz
sad

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