Question

garrett throws a large rock into a waveless pond. the impact of the rock hitting the water causes waves to travel along the ponds surface toward the shore.
if garrett counts the number of waves that reach the shore over a 10 - second period, what property of the waves is he measuring?
a. wavelength
b. speed
c. amplitude
d. frequency

Explanation:

Frequency is defined as the number of waves that pass a given point in a certain amount of time. In this case, Garrett is counting the number of waves that reach the shore over a 10 - second period. Wavelength is the distance between two consecutive crests or troughs of a wave. Amplitude is the maximum displacement of a wave from its rest position. Speed is the rate at which a wave travels and is calculated as \(v = f\lambda\) (where \(v\) is speed, \(f\) is frequency, and \(\lambda\) is wavelength). Since he is counting the number of waves over a time period, he is measuring frequency.

Answer:

D. frequency