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E M B I B E
Together With Physics Class 9
>
Chapter 7 - Sound
>
Self Evaluation Test
>
Q 12
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EASY
9th ICSE
IMPORTANT
Earn 100
A source of wave produces
20
crests and
20
troughs in
0
.
2
s
. Calculate the frequency of wave.
Important Questions on Sound
EASY
9th ICSE
IMPORTANT
Together With Physics Class 9
>
Chapter 7 - Sound
>
Self Evaluation Test
>
Q 13
State four applications of ultrasound.
EASY
9th ICSE
IMPORTANT
Together With Physics Class 9
>
Chapter 7 - Sound
>
Self Evaluation Test
>
Q 14
How does sound propagate in air?
MEDIUM
9th ICSE
IMPORTANT
Together With Physics Class 9
>
Chapter 7 - Sound
>
Self Evaluation Test
>
Q 15
Ocean waves of
0
.
125
Hz
have velocity
12
.
5
m
/
s
. Find the wavelength of these waves. Also, find the horizontal distance between a wave crest and its adjoining wave trough.
