4. A sound wave travels at a speed of 339 ms-t. If its wavelength
is 1.5 cm, what is the frequency of the wave? Will it be audible?
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Answer:
Velocity of sound wave v = 339v=339 ms^{-1}ms−1
Wavelength of the waves \lambda = 1.5λ=1.5 cmcm = 0.015= 0.015 mm
\therefore∴ Frequency of the waves \nu = \dfrac{v}{\lambda} = \dfrac{339}{0.015} = 22.6ν=λv=0.015339=22.6 kHz
Audible frequency range for human ear lies between 2020 Hz to 2020 kHz
Thus this waves is not audible.
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