A progressive wave travelling along a wire has frequency $10\,\text{Hz}$. Two points on the wire that are $0.25\,\text{m}$ apart show a phase difference of $22.5^\circ$. What is the maximum speed of the wave?
- A$2.5\,\text{m s}^{-1}$
- B$10\,\text{m s}^{-1}$
- C$20\,\text{m s}^{-1}$
- D$40\,\text{m s}^{-1}$