Question: A 2 0 cm long copper rod , and ( : C p = 0 . 3 8 5 k J k g . C

A 20 cm long copper rod , and (:Cp=0.385kJkg.C} of diameter 2.0 cm is initially at a uniform temperature of 100C. It is now exposed to an air stream at 20C with a heat transfer coefficient of 200Wm2.K.
a. Find the Biot number and comment if Lumped system method can be used to analyze the above problem.
b. Determine the temperature of the rod after 4 minutes.
c. What is the total heat lost by the rod in 4 minutes?
A 2 0 cm long copper rod , and ( : C p = 0 . 3 8

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