Agricultural Engineering > GATE 2017 > Heat Transfer
A sphere 3.5 cm diameter made of copper (ρ = 8954 kg/m³, Cp = 0.4 kJ/kg K, k = 375 W/m K) is initially at uniform temperature of 200°C. It is suddenly placed in an environment of 35°C having convective film coefficient of 12 W/m² K. After 18 minutes of exposure, the temperature of the sphere in °C will be
Correct : 123
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