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Science CBSE Homework Assignments
Class 9
Sound
Types of wave
3.
Types of wave
Task:
2
m.
1
.
The density of air at some point in a longitudinal sound wave is minimum at an instant. The pressure of air at that point is:
minimum
maximum
equal to atmospheric pressure
none of the above
2
.
Which of the following is an elastic wave?
light wave
radio waves
sound wave
microwaves
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