Question

How is the frequency of a wave measured?
a. the number of complete back and forth vibrations of a particle of the object per unit of time
b. how loud the sound is
c. how many animals can hear the sound
d. how high do the sound waves go

Answer 1

D. How high do the sound waves go

Answer 2

It’s A, the actual image of the wave is supposed to show how it bounces back and forth with vibrations.