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Science CBSE Homework Assignments
Class 9
Sound
Basics of sound and vibrating objects
3.
Vibrating object
Task:
2
m.
1
.
When the vibrating object moves backwards, it creates a region of low pressure called
Refraction
Reflection
Rarefaction
Retardation
2
.
Mexican wave in a stadium is an example of
Longitudinal wave
Transverse wave
Electromagnetic wave
None of these
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