K.C.S.E Physics Q & A - MODEL 2005PP1QN17

K.C.S.E Physics Q & A - MODEL 2005PP1QN17

​An electronic siren producing sound continuously at a certain frequency is dropped from the top to a deep hole. State and explain what is observed about the pitch of the sound reaching the observer at the top. 

answers

• The pitch decreases as the siren falls
• The higher the speed away from the observer, the lower the frequency heard and so the lower the pitch hard.