Question

The average speed of sound is 343 m/s. If a wavelength of a certain sound is 1.3 m, what is the frequency of that sound?

The average speed of sound is 343 m/s. If a pitch is heard at 500 Hz, what is the wavelength of that sound?

What is the wavelength of a wave if it moves at 100 m/s and has a frequency of 33 Hz?

Answer 1

Explanation:

(A) Speed of sound is 343 m/s

Wavelength of a sound wave is 1.3 m

Frequency,

$f=\dfrac{v}{\lambda}\\\\f=\dfrac{343}{1.3}\\\\f=263.84\ Hz$

(B) The average speed of sound is 343 m/s.

Pitch of the sound is 500 Hz

Wavelength,

$\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{343}{500}\\\\\lambda=0.68\ m$

(C) Speed of wave is 100 m/s

Frequency of wave is 33 Hz

Wavelength,

$\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{100}{33}\\\\\lambda=3.03\ m$