A floating leaf oscillates up and down 2 complete cycles 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 wave's speed can be calculated using the formula:
v = λ f
where v is the wave speed, λ is the wavelength, and f is the frequency.
In this case, the wavelength is given as 10 m, and the frequency can be calculated as:
f = (number of cycles) / (time) = 2 / 1 = 2 Hz
Substituting the values in the formula, we get:
v = 10 m * 2 Hz = 20 m/s
Therefore, the wave's speed is 20 m/s. The correct choice is C) 20 m/s.

A Floating Leaf Oscillates Up and Down 2 Complete Cycles