Question

The wavelength of the sound emitted by a tuning fork in air is 3 metre speed of sound in air and in water are 330 metre per second and 1400 m per second respectively wavelength of sound in water

Answer 1

Hey There!!!

When a wave enters one medium from another medium, it's wavelength may change. But, Frequency remains constant

The formula relating speed, wavelength and frequency is :

$v=\lambda f$

In Air, 
$\lambda = 3\, m \\ \\v=330 \, m s^{-1} \\ \\ \implies 330=3\times f \\ \\ \implies f=\frac{330}{3} \\ \\ \implies \textbf{f=110\, Hz}$

Now, in Water


$v=1400\, m s^{-1}$ 

Also, we have $f = 110\, Hz$

So,
$v=\lambda f \\ \\ \implies \lambda = \frac{v}{f} \\ \\ \implies \lambda = \frac{1400}{110} \\ \\ \implies \boxed{\lambda \approx 12.73 \, m}$

Hope it helps
Purva
Brainly Community

Answer 2

-Explanation:- frequency = 170hz

speed of sound = 340m/s

-as we know ,speed of sound= freqency ×wavelength

so, 340=170 × wavelength

=wavelength = 340/170 = 2m/s

-answer :-2.0 m/s