Q2 of 16 Page 22

Fill in the blanks with suitable words :

The velocity of sound in air at 25 °C is approximately ________.

The velocity of sound in air at 25°C is approximately 346 m/s .


Explanation: Velocity of sound depends on the medium as well as temperature of the medium. Hence at a particular temperature, a particular velocity can be measured.


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2

Fill in the blanks with suitable words :

The product of frequency and wavelength of a sound wave is equal to its ___________ .

 2

Fill in the blanks with suitable words :

The SI unit of wavelength is ____________ .

 3

Answer the following:

Why is sound a longitudinal wave?

 3

Answer the following:

Explain an activity to show that sound can do work.