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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 13 - Thermal Expansion, Calorimetry and Transmission of Heat > A room at 20 C is heated by a heater of resistance 20 ohm connected to 200 V mains. The temperature is uniform throughout the room and the heat is transmitted through a glass window of area 1m^2 and thickness 0.2 cm. Calculate the temperature outside. Thermal conductivity of glass is 0.2 cal/mC s and mechanical equivalent of heat is 4.2 J/cal.

A room at 20 C is heated by a heater of resistance 20 ohm connected to 200 V mains. The temperature is uniform throughout the room and the heat is transmitted through a glass window of area 1m^2 and thickness 0.2 cm. Calculate the temperature outside. Thermal conductivity of glass is 0.2 cal/mC s and mechanical equivalent of heat is 4.2 J/cal.

The rates of cooling of two different liquids put in exactly similar calorimeters and kept in identical surroundings are the same if