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Q. A group of hikers hears an echo 3 s after shouting. If temperature is 16°C, how far away is the mountain that reflected sound wave?

Q. A Carnot engine performs work at the rate of 400kW even as using 700 kcal of heat per second. If the temperature of the heat source is 650 degrees Celsius, at what temperature is waste heat exhausted?

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Category:- Physics
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