HARD
9th ICSE
IMPORTANT
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Is water waves a mechanical wave?

Important Questions on Sound
MEDIUM
9th ICSE
IMPORTANT

HARD
9th ICSE
IMPORTANT

EASY
9th ICSE
IMPORTANT

HARD
9th ICSE
IMPORTANT
What is the relationship between velocity, frequency and wavelength of a wave?

HARD
9th ICSE
IMPORTANT

MEDIUM
9th ICSE
IMPORTANT

HARD
9th ICSE
IMPORTANT

MEDIUM
9th ICSE
IMPORTANT
Why is lightning seen before thunder?
