Question

A motorboat is tied to a dock with its motor running. The spinning propeller makes a surface wave that moves at a speed of 400 cm/s with a wavelength of 100 cm. What is the wave’s frequency?

4 Hz

40 Hz

0.25 Hz

25 Hz

Answer 1

The wave frequency is 0.25Hz .

Answer 2

4 Hz

Step-by-step explanation:

1. Speed = Wavelength x Wave Frequency can be changed to Frequency = Speed/Wavelength.

2. Speed (400) / Wavelength (100) = Frequency of 4 cm/s or 4 Hz.