Question

An organ pipe that is closed at one end has a length of 3 m. What is the second longest harmonic wavelength for sound waves in this pipe

Answer 1

Given

Lenght 3m

Procedure

The relationships between the standing wave pattern for a given harmonic and the length-wavelength relationships for closed-end air columns are summarized below.

Harmonic # 3

`\begin{gathered} \lambda=(4)/(3)\cdot L \\ \lambda=(4)/(3)\cdot3 \\ \lambda=4\text{ m} \end{gathered}`

The second-longest wavelength would be 4m