A referee blows a whistle. The sound from the whistle has a frequency of 2.5 kHz2.5\ \text{kHz}2.5 kHz.
The speed of sound in air is 340 m/s.
Show that the wavelength of the sound is about 0.14 m.
Calculate the period of the sound wave.
Use the equation
period=1frequency\text{period} = \dfrac{1}{\text{frequency}}period=frequency1
A spectator hears the whistle 0.60 s after it is blown.
Calculate the distance between the spectator and the referee.
The referee uses a different whistle with a frequency of 5.0 kHz5.0\ \text{kHz}5.0 kHz.
Explain what happens to the wavelength of the sound.