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Engineering, 15.11.2019 05:31 kataldaine

Asolid aisi 302 stainless steel sphere of diameter 210 mm is coated with a 2-mm dielectric layer with a thermal conductivity 0.03 w/m·k. the sphere is suddenly quenched in a liquid at 100°c with a convective coefficient of 3500 w/m2·k . after five hours, the sphere reaches a temperature of 150°c. what was the initial temperature of the stainless steel sphere

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