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4 A room at 20 C is heated by a heater of power 2 kW...

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4 A room at 20 C is heated by a heater of power 2 kW The temperature is uniform throughout the room and the heat is transmitted thrugh a glass window of area 1 m and thickness 0 2 cm Calculate the temperature outside Thermal conductivity of glass is 0 2cal m C sec and mechanical equivalent of heat is 4 2 J cal a 15 24 C b 15 22 C c 15 23 C d 15 26 C

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