What is the frequency of the sound made by a si... - JAMB Physics 1992 Question
What is the frequency of the sound made by a siren having a disc with 32 holes and making 25 revolution per seconds?
A
80Hz
B
600Hz
C
800Hz
D
1600Hz
correct option: c
No of holes x Revolution
F = NH x NR
= 32 x 25
= 800Hz
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