EASY
9th CBSE
IMPORTANT
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Mechanical waves require for propagation.

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Important Questions on Sound
MEDIUM
9th CBSE
IMPORTANT
X-Rays, light rays are electromagnetic waves.

EASY
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT
