Question

When a sound source is moving away from an observer, the observer will hear a lower pitch. This is due to

(A) an increase in the frequency of the sound wave.
(B) a decrease in the amplitude of the sound wave. (C) an increase in the amplitude of the sound wave.
(D) a decrease in the frequency of the sound wave.

Answer 1

Is this D?

Answer 2

yep :)

Answer 3

Shukria :) @pooja195

Answer 4

lol no problem :)