A 60 cm-long, 3 cm-diameter AISI 1010 steel rod with thermal conductivity of 59 W/m-K is welded to a furnace wall and passes through 20 cm of insulation before emerging into the surrounding air. The furnace wall is at 300^o C?, and the air temperature is 20^o Cn? Estimate 

a). the heat loss through the rod, and

b). the temperature of the bar tip if the heat transfer coefficient between the rod and air is taken to be 13 W/m² K.

  

20 cm 3 cm diameter Insulation AISI 1010 steel rod Furnace wall 60 cm Air