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प्रश्न
What type of sound is produced by elephants and whales?
एक पंक्ति में उत्तर
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उत्तर
The elephants and whales produce the sound of frequency less than 20Hz. (means infrasonic sounds)
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संबंधित प्रश्न
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| (i) | (ii) | (iii) |
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