Question: A sphere made of copper having 10 mm inner diameter is placed to an environment at 75C. When the sphere is removed from this

A sphere made of copper having 10 mm inner diameter is placed

A sphere made of copper having 10 mm inner diameter is placed to an environment at 75C. When the sphere is removed from this environment and exposed to air flow at atmospheric pressure (1 atm). The velocity of air is 10 m/s with a temperature of 23 C. Eventually the temperature of the copper become 35C. Calculate the heat transfer coefficient. @328K,copper p=8933kg/m,k=399W/mK, cp = 387J/kgK @296K, air =181.610 7 Ns/m, k = 0.0258W/mK, Pr = 0.709 @328 K, air u=197.8x107 Ns/m

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