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(c) At 10°C, how far
how far away is a reflecting surface, if you hear an echo in 0.274 s?
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The velocity of sound in dry air is approximately 343 m/s at a temperature of 25 °C. Therefore, the reflecting object must be more than 17.2m from the sound source for echo to be perceived by a person located at the source.
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Answer:jai hanuman
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