Explain how the stationary wave is formed from the incident sound wave.
On Fig. 5.2, sketch a graph to show how the amplitude of the stationary wave varies with height $h$ above the bottom of the tube.
For the stationary wave, state the direction in which an air particle oscillates at a height of $0.15\,\text{m}$ above the bottom of the tube.
For the stationary wave, state the phase difference between the oscillations of a particle at a height of $0.10\,\text{m}$ and a particle at a height of $0.20\,\text{m}$ above the bottom of the tube.
The speed of the sound wave is $340\,\text{m s}^{-1}$. Calculate the frequency of the sound wave.
The frequency of the sound wave is increased gradually. Determine the frequency of the wave when the next stationary wave is formed.