A plate having 10 cm2 area each side is hanging in the middle of a room of 100 m2 total surface area. The plate temperature and emissivity are respectively 800 k and 0.6. The temperature and emissivity values for the surfaces of the room are 300 k and 0.3 respectively. Boltzmann's constant Ď = 5.67 Ă— 10-8 w/m2 k4. The total heat loss from the two surfaces of the plate is:
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