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प्रश्न
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a furnished room
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उत्तर
In furnished room, echo is very less. Hence, he can conclude that he was in a furnished room.
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संबंधित प्रश्न
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Name the device which is used to address a small gathering of people.
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Answer the following question in your own words.
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When sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound remain the same. Do you hear an echo sound on a hotter day? Justify your answer.
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Speed of sound in oxygen: 340 ms-1
Speed of sound in benzene: 200 ms-1
