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Science CBSE Homework Assignments
Class 9
Sound
SONAR
1.
Range of sound waves
Task:
3
m.
Drag and match the right answer
:
Answer variants:
Infrasonic sound
Audible sound
wave
Ultrasonic sound
1
.
\(20\)
\(Hz\) \(-\)
2
.
\(25000\)
\(Hz\) \(-\)
3
.
\(5\)
\(Hz\) \(-\)
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