The frequency of the wave is 250 Hz
Explanation:
The equation that relates speed, frequency and wavelength of a wave is the following:
[tex]v=f \lambda[/tex]
where
v is the speed of the wave
f is its frequency
[tex]\lambda[/tex] is the wavelength
For the sound wave in this problem we have
v = 1000 m/s is the speed
[tex]\lambda = 4 m[/tex] is the wavelength
Therefore, we can find the frequency:
[tex]f=\frac{v}{\lambda}=\frac{1000}{4}=250 Hz[/tex]
Learn more about waves, frequency and wavelength here:
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