K.C.S.E Physics Q & A - MODEL 2019PP2QN05

K.C.S.E Physics Q & A - MODEL 2019PP2QN05

​In a siren, sound is produced when a jet of air is directed perpendicular to a ring of holes on a rotating wheel. Explain the effect on the pitch of sound produced when the speed of rotation of the wheel is increased. 

answer

• Increasing speed increases the frequency of the sound causing an increase in the pitch(higher pitch)