A pipe that is 120 cm long resonates to produce sound of wavelengths 480 cm,160 cm,and 96 cm but does not resonate at any wavelengths longer than these.This pipe is
A) open at both ends.
B) open at one end and closed at the other end.
C) closed at both ends.
D) We cannot tell because we do not know the frequency of the sound.

Question

Quizplus · Accepted Answer

The pipe resonates at wavelengths that are odd multiples of a quarter of its length (120 cm), which is characteristic of a pipe that is open at one end and closed at the other. The given wavelengths (480 cm, 160 cm, and 96 cm) correspond to 1/4, 3/4, and 5/4 times the length of the pipe, respectively, fitting the pattern for a pipe open at one end and closed at the other.

A Pipe That Is 120 Cm Long Resonates to Produce