Question

the wavelength of sound waves in hydrogen gas corresponding to the lower limit of audibility is

Answer 1

Lower limit of frequency= 20 hz

speed of Sound in hydrogen gas= 1350m/sec.

wavelength=

$\frac{speed}{frequency}$

= 1350/20

= 67.5 m

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Answer 2

Hey mate...

here's the answer

For a sound wave,

Speed = frequency × wavelength

Wavelength = speed/frequency

Wavelength = 1350/20

Wavelength = 67.5m

Hope this helps❤