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13. Sound
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Q63 of 123 Page 254

What is the frequency of a vibrating body whose time-period is 0.05 second ?

Time Period given by the inverse of the frequency.




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62

Name two animals which can hear ultrasonic sounds.

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What is a vibration (or an oscillation)? Define 'amplitude' of vibration of an object.

64

State two methods of producing sound.

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How does sound from a sound producing body travel through air to reach our ears?

Questions · 123
13. Sound
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