(a) What is the rate of energy loss in watts per square meter through a glass window 2.4 mm thick if the outside temperature is -5.1°F and the inside temperature is +70°F? (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 5.9 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? (The thermal conductivity of window glass is 1.0 W/m-K, and of air is 0.026 W/m.K.) (a) Number i Units
(a) What is the rate of energy loss in watts per square meter through a glass window 2.4 mm thick if the outside temperature is -5.1°F and the inside temperature is +70°F? (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 5.9 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? (The thermal conductivity of window glass is 1.0 W/m-K, and of air is 0.026 W/m.K.) (a) Number i Units
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Transcribed Image Text:(a) What is the rate of energy loss in watts per square meter through a glass window 2.4 mm thick if the outside temperature is -5.1°F
and the inside temperature is +70°F? (b) A storm window having the same thickness of glass is installed parallel to the first window,
with an air gap of 5.9 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss
mechanism? (The thermal conductivity of window glass is 1.0 W/m-K, and of air is 0.026 W/m.K.)
(a) Number i
(b) Number
Units
Units
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