A sphere 15 cm in diameter is covered with 5 cm of insulation (k = 0.0 – McqOptions

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1.	A sphere 15 cm in diameter is covered with 5 cm of insulation (k = 0.057 kcal/m-hr-?C). The inside and outside surface temperature of the insulation are 315?C and 80?C respectively. The heat loss per sq. m of the outside surface will be closer to
A.	80 kcal/hr
B.	320 kcal/hr
C.	160 kcal/hr
D.	37,500 kg
E.	40 kcal/hr
Answer» D. 37,500 kg

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