A bicycle gear wheel is a disc with 50 ‘teeth’ spaced evenly around its rim. It turns 10 times every second. As the wheel spins, a springy metal strip is made to vibrate by the passing ‘teeth’. The sound produced by the metal strip has a frequency equal to the strip’s vibration frequency. The speed of sound in air is $330\,\text{m s}^{-1}$. What wavelength does the emitted sound have?
- A$0.66\,\text{m}$
- B$1.5\,\text{m}$
- C$6.6\,\text{m}$
- D$500\,\text{m}$