A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. Calculate the frequency and wavelength in air of the note produced (take v = 350m/s)
a
0.795m
b
0.625m
c
0.335m
d
0.125m
Explanation
Correct Option
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Discussions (16)
De sage
1 year ago
frequency= No of hole× No of oscillation.
no of hole=200
no of oscillation ( supposed to be in rev/sec) = 132/60 to convert to seconds.
no of oscillation= 2.2 rev/sec
therefore
f= 200× 2.2
f=440hz
looking for wavelength
velocity= frequency × wavelength
velocity=350m/s
f= 440
W= ?
lamda =350/440
lamda= 0.795 m
Queenfayvour
5 years ago
my school please the answer is incorrect. 350/440= 0.795
the options needs to be reviewed. Thanks
