A long rod 6.5 mm in diameter is exposed to an environment at 27°C. The base temperature of the rod is 150°C. The heat transfer coefficient between the rod and environment is 30 W/m 2 .K. Calculate...

A long rod 6.5 mm in diameter is exposed to an environment at 27°C. The base temperature of the rod is 150°C. The heat transfer coefficient between the rod and environment is 30 W/m².K. Calculate the heat loss by the rod.

Explain the situation, when addition of fins to a surface is not useful.