A wave has a period of 5.0 s. What is its frequency?

Answer: 0.2Hz

Explanation:

Given that

period of wave (T) = 5.0 seconds

frequency of wave (F) = ?

The frequency (F) of a wave is the number of cycles which the wave complete in one second. Thus, it is inversely proportional to the period (T) of the wave, and its unit is Hertz

Hence, apply the formula F = 1/T

F = 1/5.0 seconds

F = 0.2Hz

Thus, the frequency of the wave is 0.2Hz