What is the frequency of the sound made by a siren having a disc with...
PHYSICS
JAMB 1992
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 Answer: C. 800Hz
Explanation
No of holes x Revolution
F = NH x NR
= 32 x 25
= 800Hz
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