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A steel ball c=0.46kJ/kgC K=35W/mC5cm-dia intially at a uniform temp of 450C is suddenly placed in an controllel environment temp@100 Ch=10N/m2 Find time reg for

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A steel ball c=0.46kJ/kgC K=35W/mC5cm-dia intially at a uniform temp of 450C is suddenly placed in an controllel environment temp@100 Ch=10N/m2 Find time reg for ball to attain a temp 150C

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