The thermal conductivity of stainless steel has been characterized experimentally to vary with temperature as k(T) =

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The thermal conductivity of stainless steel has been characterized experimentally to vary with temperature as k(T) = 9.14 + 0.021T for 273 < T < 1500 K, where k is in W/m∙K and T is in K. Determine the average thermal conductivity between 300 and 1200 K, and express k(T) in the form of k(T) = k0 (1 + βT ), where k0 is in W/m∙K and b is in K−1.

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