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Reported Question / Answer
Q.) The speed of sound in water is four times its speed in air. When a sound wave of frequency 'n' and wavelength 'λ' enters from air into water, then its frequency and wavelength will respectively become -
1)
4n and λ
2)
n and 4λ
3)
2n and λ
4)
None of these
5)
NULL
Answer :
2
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Human Verification : Answer 2 + 3 = ?
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