A hot dog can be considered to be a 12 centimeter long cylinder, whose diameter is...

A hot dog can be considered to be a 12 centimeter long cylinder, whose diameter is 2 cm and whose properties are ? = 980 kg/m3 , cp = 3.9 kJ/kg · K, k = 1.2 W/m · K, and ? = 2 × 10?7 m2 /s. A hot dog initially at 5?C is dropped into boiling water at 100?C. The heat transfer coefficient at the surface of the hot dog is estimated to be 600 W/m2 · K and the hot dog can be considered cooked when its center temperature reaches 80?C (a) Determine how long it will take to cook considering the hot dog as a long cylinder. (b) Determine the cooking time assuming lumped capacitance.

Expert Solution

samet mamat answered 3 years ago

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