Q2) Consider a copper pin fin 0.25 cm in diameter k = 396 W/m. K that protrudes from a wall a 95°C into ambient air at 25°C. The heat transfer is mainly by natural convection with a coefficient equal...

Extracted text: Q2) Consider a copper pin fin 0.25 cm in diameter k = 396 W/m. K that protrudes from a wall a 95°C into ambient air at 25°C. The heat transfer is mainly by natural convection with a coefficient equal to 10 W/m K. Calculate the heat loss. assuming that : (a) The fin is "infinitely long" (b) The fin is 2.5 cm long and the coefficient at the end is the same as around the circumference.