A certain sound has a frequency of $256$ hertz and a wavelength of $1.3$ m. Calculate the speed with which this sound travels.

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Solution

Frequency of sound waves $ν = 256 H z$
Wavelength $λ = 1.3 m$
So, speed with which the sound waves travel $v = ν λ$
$∴$ $v = 256 \times 1.3$
$⟹ v = 332.8 m / s$

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(1) Sound wave has frequency 320 Hz and wavelength 0.25 m. How much distance will it travel in 10 second.

[Ans : 800 m.]

(2) A sound wave having certain frequency travels with a speed of 336 m/s and wavelength 3 cm. calculate the frequency. Will it be audible?

[11200 Hz, Yes.]

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