Q8. A ceramic cube of side a = 1 cm is at temperature 420 °C it is suspended inside an evacuated box by a glass rod of length 25 cm and cross-sectional area 2 cm². The temperature of the walls of the box is 25 °C. Given that the thermal conductivity of glass is 0.84 J/smK and that the emissivity of ceramic is 0.7, calculate the heat lost by the cube in one second?
Q8. A ceramic cube of side a = 1 cm is at temperature 420 °C it is suspended inside an evacuated box by a glass rod of length 25 cm and cross-sectional area 2 cm². The temperature of the walls of the box is 25 °C. Given that the thermal conductivity of glass is 0.84 J/smK and that the emissivity of ceramic is 0.7, calculate the heat lost by the cube in one second?
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