Question

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Answer 1

first wavelength =17.2

second wavelength =0.0172

Answer 2

Answer:

For a sound wave,

Speed = Wavelength x Frequency

v = Î x f

Speed of sound in air = 344 m/s (Given)

(i) For, f = 20 Hz

λ1= v/f = 344/20 = 17.2 m

(ii) For, f= 20000 Hz

λ2= v/f = 344/20000 = 0.172 m

Hence, for humans, the wavelength range for hearing is 0.0172 m to 17.2 m.

Explanation: