28. Sound wave of frequency 1000 hzin air strikes the
surface of a lake and penetrates into water. If
speed of the sound in water is 1500 m/s, the
frequency and wavelength of wave in water are
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=Given that sound travels in air at 340m/s, find the wavelength of the waves in air produced by a 20kHz sound source. If the same source is put in a water tank, what would be the wavelength of the sound waves in water? Speed of sound in water =1,480m/s
Frequency f=20,000H
Explanation:
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