Waves on the surface of a liquid are observed to have a wavelength of 12.9 mm and a speed of 30.9 cm/s.The frequency of the wave motion is
A)1.8 mHz
B)24 Hz
C)42 mHz
D)2.4 Hz
E)2.4 mHz

Question

Quizplus · Accepted Answer

We can use the wave equation:

v = f × λ

where:
v = wave speed (30.9 cm/s)
λ = wavelength (12.9 mm = 1.29 cm)

Solving for frequency (f):
f = v / λ

f = 30.9 cm/s / 1.29 cm
f ≈ 23.95 Hz

Therefore, the frequency of the wave motion is approximately 24 Hz, which is closest to choice B.

Waves on the Surface of a Liquid Are Observed to Have