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

(a) 420W
(b) 5040W
(c) 17,600W
(d) 1256W
(e) 2520W

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.