Answer:
1000 Hz
Explanation:
The frequency would be 1000 Hz.
The frequency, wavelength, and speed of a wave are related by the equation:
v = fλ ..................(1)
where v = speed of the wave, f = frequency of the wave, and λ = wavelength of the wave.
Making f the subject of the formula:
f = v/λ.........................(2)
Also, speed (v) = distance/time.
From the question, distance = 900 m, time = 3.0 s
Hence, v = 900/3.0 = 300 m/s
Substitute v = 300 and λ = 0.3 into equation (2):
f = 300/0.3 = 1000 Hz
