Heat is lost steadily through a 0.5 cm thick 2 m × 3 m window glass whose thermal conductivity is 0.7 W/m°C. The inner and outer surface temperatures of the glass are measured to be 12°C to 9°C. The rate of heat loss by conduction through the glass is:

Heat is lost steadily through a 0.5 cm thick 2 m × 3 m window glass w

1.	Heat is lost steadily through a 0.5 cm thick 2 m × 3 m window glass whose thermal conductivity is 0.7 W/m°C. The inner and outer surface temperatures of the glass are measured to be 12°C to 9°C. The rate of heat loss by conduction through the glass is:
A.	420 W
B.	5040 W
C.	1256 W
D.	2520 W
Answer» E.

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Heat is lost steadily through a 0.5 cm thick 2 m × 3 m window glass whose thermal conductivity is 0.7 W/m°C. The inner and outer surface temperatures of the glass are measured to be 12°C to 9°C. The rate of heat loss by conduction through the glass is:

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