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  3. this past winter you left the tip of a cylindrical...

Question: this past winter you left the tip of a cylindrical...

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This past winter you left the tip of a cylindrical brass (copper, cartridge brass) fireplace poker resting in the family fireplace. The tip is in contact with a burning log at 500°C. If the poker is 90 cm in length and 1 cm in diameter, determine the reaction of your uncle when he removes the poker from the fire. (That is, determine the temperature at the handle [80 cm from the tip.]) Neglect radiation and assume the ambient air is at 25°C with a convection heat transfer coefficient of 18 W/m2-K. Assume constant properties at 400 K. (Hint: You may want to consider modeling the poker as a fin.) 1.

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