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Science CBSE Homework Assignments
Class 9
Sound
Types of wave II
2.
Particles of medium
Task:
2
m.
1
.
In the compression region of the medium in case of longitudinal wave:
the volume monetarily decreases
the density momentarily increases
the pressure monetarily increases
all the above
2
.
A part of longitudinal wave in which particles of medium are farther away than the normal particles is called:
rarefaction
trough
compresion
crest
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