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प्रश्न
What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20°C) ?
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उत्तर
The minimum distance in air required from a sound-reflecting surface to hear an echo at 20°C is 17.2 m.
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संबंधित प्रश्न
An echo returned in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m s−1?
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A man is standing between two vertical walls 680 m apart. He claps his hands and hears two distinct echoes after 0.9 seconds and 1.1 seconds respectively. What is the speed of sound in the air?
