Q2 of 16 Page 22

Fill in the blanks with suitable words :

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

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


Explanation: v = f where v is velocity, is wavelength and f is frequency. They determine the pitch of the sound wave.


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In an unoccupied hall of a courtly you will experience the echo effect of sound. If the same hall is furnished with almirahs, tables, chairs, and other commodities, you may not experience the echo clearly. It is because,

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Fill in the blanks with suitable words :

The SI unit of wavelength is ____________ .

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Fill in the blanks with suitable words :

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