If you are standing on the street listening to the siren of an ambulance as it is moving away from you, which of the following is TRUE?
A) the pitch/frequency of the siren seems lower than it really is
B) the siren sounds louder than it really is
C) none of the above
D) the pitch/frequency of the sound is identical to what it would have been if the ambulance were not moving
E) the pitch/frequency of the siren seems higher than it really is
Ans: A) the pitch/frequency of the siren seems lower than it really is
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