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प्रश्न
The speed of highly penetrating ultrasonic waves is :
पर्याय
lower than those of audible sound waves
higher than those of audible sound waves
much higher than those of audible sound waves
same as those of audible sound waves
उत्तर
The speed of sound wave in air is independent of its frequency.
(d) Same as those of audible sound waves.
APPEARS IN
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