Audio frequency range of a human ear is 20hz - 2 hz. express the range in terms of time period ? answer needed urgently. pl. ! s. ramya

Using the term c in this case is a little confusing. It is more generic to use a general velocity, v. That way, in this case, we know to use the speed of sound. 

wavelength*frequency=v 

wavelength_20Hz = (345 m/s)/(1/20s) 

wavelength_20kHz = (345 m/s)/(1/20000s)

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