Question
An organ pipe $40 \mathrm{~cm}$ long is open at both ends. The speed of sound in air is $360 \mathrm{~ms}^{-1}$. The frequency of the second harmonic is ___________ $\mathrm{Hz}$.
Correct Answer
900
An organ pipe $40 \mathrm{~cm}$ long is open at both ends. The speed of sound in air is $360 \mathrm{~ms}^{-1}$. The frequency of the second harmonic is ___________ $\mathrm{Hz}$.