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प्रश्न
What is the minimum distance needed for an echo?
उत्तर
- The minimum distance required to hear an echo is 1/20th part of the magnitude of the velocity of sound in air.
- If you consider the velocity of sound as 344 ms-1, the minimum distance required to hear an echo is 17.2 m.
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संबंधित प्रश्न
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