Understanding the Concepts

* Frequency: The number of waves that pass a fixed point in one second. It's measured in Hertz (Hz).

* Wavelength: The distance between two consecutive crests (or troughs) of a wave.

* Speed: How fast a wave travels.

Formula

The relationship between these concepts is:

* Speed (v) = Frequency (f) × Wavelength (λ)

Solving the Problem

1. We know:

* Speed (v) = 36 m/s

* Wavelength (λ) = 12 m

2. We want to find:

* Frequency (f)

3. Rearranging the formula to solve for frequency:

* f = v / λ

4. Plugging in the values:

* f = 36 m/s / 12 m = 3 Hz

Answer: The wave moves across a set point 3 times every second.