Physics > 2021 > 35
WASSCE
A rotating disc contains sets of holes in a circle, An air jet is directed onto the holes and a note of frequency 480Hz is produced. If the number of holes is 20, calculate the speed of rotation of th disc
A.
10 rev/s
B.
20 rev/s
C.
24 rev/s
D.
8 rev/s
Answer: C
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