Question

which refers to the number of wavelengths that pass a fixed point in a second?
wavelength
amplitude
frequency
compression

Explanation:

• Wavelength: It is the distance between two consecutive crests or troughs in a wave.
• Amplitude: It is the maximum displacement of a wave from its rest position.
• Frequency: It is defined as the number of wavelengths (or cycles) that pass a fixed point in one second.
• Compression: It is a region in a longitudinal wave where the particles are close together.

Answer:

frequency