A floating leaf oscillates up and down two complete cycles in one second as a water wave passes by. The wave's wavelength is 10 meters. What is the wave's speed?
A) 10 m/s
B) 20 m/s
C) 40 m/s
D) 2 m/s
E) more than 40 m/s

Question

Quizplus · Accepted Answer

The wave's speed can be calculated using the formula speed = frequency × wavelength. Given that the leaf completes two cycles per second, the frequency is 2 Hz. With a wavelength of 10 meters, the speed = 2 Hz × 10 m = 20 m/s.

A Floating Leaf Oscillates Up and Down Two Complete Cycles