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14.
A mild steel sphere of 15 mm in diameter initially at 625°C is exposed
ho
to a current of air at 25°C with convection coefficient of 120 W/m2K.
The total energy transferred during first one minute is
J.
(Rounded off to two decimal places).
(Take k = 43 W/mK, p = 7850 kg/m², c = 474 J/kg.K, and a = 0.045
m/s)
Your Answer: 23.47
Answer Range: (2120.55, 2127.55)
Correct Answer: 2125.83


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