Question: QI. Consider a hot surface at 120 C that is to be cooled by attaching 4 cm long. 0.25 cm diameter copper pin fins (k

QI. Consider a hot surface at 120 C that is to

QI. Consider a hot surface at 120 C that is to be cooled by attaching 4 cm long. 0.25 cm diameter copper pin fins (k = 355 W/m C ) to it, with acenter-to-center distance of 0.8 cm, as shown The temperature of the surrounding medium is 25 C, and the heat transfer coefficient en the surfaces is 45 W/m2 C. Assuming negligible heat loss from the fins tip. Determine: (a) The rate of heat transfer from the surface fora (1 mx1 m) section of the plate. (b) The overall effectiveness of the fins. (c) The temperature at the middle of the fin

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