Question

A medium has a sound wave propagating through it with a speed of 1500 m/sec and wavelength 5 m. Its frequency is​

Answer 1

To Find:-

The frequency

Given:-

Speed of the sound wave = 1500 m/s

Wavelength = 5m

Solution:-

We know that

$\boxed{Frequency = \dfrac{Speed \: of \: sound}{Wavelength}}$

$\implies \:f= \dfrac{1500}{5}$

$\implies \: f = 300$

Hence, frequency is 300 Hz

Now, Verification

Speed of sound = 1500 m/s

Frequency = 300 Hz

Wavelength = 5m

So,

Frequency = Speed of sound / wavelength

300Hz = 1500m/s ÷ 5m

300 = 300

L.H.S = R.H.S

Hence, Proved

↘ Note ↙

• Frequency

➝ The number of accelerations completed in one second is called frequency.

• Wavelength

➝ The distance between two consecutive compressions or rarefactions is called wavelength Wavelength is denoted by ( λ ) lambda .

• Sound

➝ A form of energy that produces the sensation of hearing in our ears is called sound.

• A sound cannot travel in vacuum.

• Sound requires a medium ( solid , liquid and gas ) for propagation