An underwater sonar source operating at a frequency of 60 kHz directs – McqOptions

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1.	An underwater sonar source operating at a frequency of 60 kHz directs its beam towards the surface. If velocity of sound in air is 330m/s, wavelength and frequency of the waves in air are ___________
A.	5.5mm, 60 kHz
B.	5.5mm, 30 kHz
C.	5.5mm, 30 kHz
D.	5.5mm, 80 kHz
Answer» B. 5.5mm, 30 kHz

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