Question

The speed of ultrasound in air is :
(a) the same as audible sound
(b) less than audible sound
(c) more than audible sound
(d) equal to the speed of light

  • Propagation of Sound Waves Class 9 ICSE
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Answer

(a) the same as audible sound

Reason — The speed of ultrasound in air is the same as audible sound i.e. 330 m s-1 .

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