Question

5. Assuming an emissivity, e = 0.85, and an area of approximately 5.3 m2, find the amount of thermal energy radiated by the body in 4 hr if the surface temperature is 15.0 0C.

6. Find the amount of thermal energy transferred through a pine wood door

in 3.00 hr if the door is 0.65 m wide, 1.23 m high, and 40.00 cm thick. The inside temperature of the door is 20.0 0C and the outside temperature of the door is −20.00 0C. (Kpine door = 1.13*10-1 J/m s 0C)

Answer 1