A glass thermometer is placed in a large room, the walls of which are maintained at 10C.

Question:

A glass thermometer is placed in a large room, the walls of which are maintained at 10◦C. The convection coefficient between the thermometer and the room air is 5 W/m2∙oC, and the thermometer indicates a temperature of 30oC. Determine the temperature of the air in the room. Take ϵ = 1.0.