If \( v_{m} \) is the velocity of sound in moist air and \( v_{d} \...

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If \( v_{m} \) is the velocity of sound in moist air and \( v_{d} \) is
\( \mathrm{P} \) the velocity of sound in dry air then:

W
(1) \( v_{m}v_{d} \)
(2) \( v_{m}v_{d} \)
(3) \( v_{d} \ggv_{m} \)
(4) \( v_{m}=v_{d} \)
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