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Subjects
Science CBSE
Class 9
Sound
Production, propagation and types of sound
3.
Properties of a sound in terms of amplitude and frequency
Exercise condition:
3
m.
Choose
the correct answer
:
1
.
Frequency is expressed in
hertz
ampere
gram
kilometer
2
.
When the amplitude of vibration is large, sound produced is
loud
feeble
very feeble
none of the above
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