In a transverse wave on a stretched string, the wavelength is $\lambda =0.80m$ and the frequency is $f=5.0\mathrm{Hz}$. What is the wave speed?

• A. $v=\frac{\lambda }{f}=0.16m·s$
• B. $v=f+\lambda =5.8$
• C. $v=f\lambda =4.0m/s$
• D. $v=\frac{f}{\lambda }=6.25s-1$

Answer: (C)