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Question: to estimate the thermal conductivity of a material it is...

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To estimate the thermal conductivity of a material, it is proposed to run an exper- iment as shown. Two very long rods of the same diameter, one of known thermal conductivity and the other whose conductivity is to be determined, are attached to a plate. The steady state temperatures at two points in the rods are measured as shown. For the measurements indicated, determine the unknown thermal conduc- tivity. The value of the convective heat transfer coefficient for both rods may be assumed to be the same. Too = 20 °C 80 °C 40°C Brass rod 35 mm 90 °C 30 °C Unknown k To 20 °C

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