Question

__________ is the number of times per second that a wave cycles.
frequency
amplitude
wavelength
speed

Explanation:

To solve this, we recall the definitions of wave properties:

• Frequency is defined as the number of wave cycles per unit time (usually per second, measured in hertz).
• Amplitude is the maximum displacement of a point on the wave from its rest position.
• Wavelength is the distance between two consecutive corresponding points on a wave (e.g., two crests).
• Speed of a wave is the distance a wave travels per unit time.

Given the question asks for the number of times per second a wave cycles, the correct term is frequency.

Answer:

A. frequency