Engineering, 22.06.2020 20:57 lolololol21

Steel sphere with diameter is to be hardened by first heating it to uniform temperature and then quenching it in large bath of water at . The

following data may be used surface heat transfer coefficient , thermal

conductivity of steel , specific heat of steel , and density of

steel . Calculate: (a) time elapsed in cooling the surface of sphere to

and (b) time elapsed in cooling the center of sphere to .

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Steel sphere with diameter is to be hardened by first heating it to uniform temperature and then qu...