A floating leaf oscillates up and down twice in 1 s as a water wave of wavelength 10 m passes by.What is the wave's speed?
A)2 m/s
B)10 m/s
C)20 m/s
D)40 m/s
E)more than 40 m/s

Question

Quizplus · Accepted Answer

The frequency of the wave is equal to the number of oscillations of the leaf per second, which is 2. The formula for the speed of a wave is given by v = fλ, where v is the speed, f is the frequency, and λ is the wavelength. Plugging in the given values, we get:

v = 2 * 10 = 20 m/s

Therefore, the wave's speed is 20 m/s, which corresponds to choice C.

A Floating Leaf Oscillates Up and Down Twice in 1