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9. A cylinder has a thermal conductivity of 25W/mK, is 250mm in length and has a radius of 50-mm. This cylinder is initially at a

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9. A cylinder has a thermal conductivity of 25W/mK, is 250mm in length and has a radius of 50-mm. This cylinder is initially at a temperature of 150C, and is suddenly immersed in a fluid bath with h=16W/m2K and T=30C. What is the Biot Number for this case

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