Final answer:
The frequency of the wave is calculated by dividing the number of waves that pass a point by the time it takes them to pass. In this case, with 15 waves passing in 5 seconds, the frequency is 3 Hz.
Step-by-step explanation:
To calculate the frequency of the water waves, we can use the relationship between the number of waves that pass a point in a given amount of time and the frequency. Frequency (f) is defined as the number of waves that pass a point per unit time and is measured in hertz (Hz). In this case, 15 water waves pass the point in 5 seconds.
Frequency (f) is given by the formula:
f = Number of waves / Time
Plugging in the given values:
f = 15 waves / 5 s = 3 Hz
Therefore, the frequency of the water waves is 3 Hz.