To calculate the frequency of the waves, you can use the wave equation, which relates the speed of the wave (v), wavelength (λ), and frequency (f) as follows:
\[ v = f \cdot \lambda \]
Where:
- \( v \) is the speed of the wave (4.0 m/s),
- \( \lambda \) is the wavelength (2.5 m),
- \( f \) is the frequency.
We can rearrange this equation to solve for frequency:
\[ f = \frac{v}{\lambda} \]
Now, substituting in the known values:
\[ f = \frac{4.0 , \text{m/s}}{2.5 , \text{m}} = 1.6 , \text{Hz} \]
Therefore, the frequency of the waves is 1.6 Hz.