Calculate the frequency of beats produced in air when two sources of sound are activated, one emitting a wavelength of 32 cm and the other of 32.2 cm. The speed of sound in air is 350 m/s.
For source A:
Wavelength 
Velocity 
Frequency 
is given by:
For source B:
Velocity 
Wavelength 
Frequency 
is given by:
∴ Beat frequency = 
Frequency of beat = 7 per second.
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