Question

Frequency is:

A. the noise floor acceptable in recording
B. the distance between the top or bottom of a wave and the center of the wave
C. the distance between two identical points on a wave
D. the number of waves in a certain amount of time

this is actually for music but there's no music topic so..

Answer 1

I think it is (D)

Step-by-step explanation:

Because in our definition . Frequency is the number of vibrations of an object per second and it sounds the same with answer (D)