A thermopane window consists of two glass panes, each 0.50 cm thick, with a 1.0-

Physics
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A thermopane window consists of two glass panes, each 0.50 cm thick, with a 1.0-cm-thick sealed layer of air in between.

(a) If the inside surface temperature is 20.8°C and the outside surface temperature is 0.0°C, determine the rate of energy transfer through 1.25 m2 of the window. 
 W 

(b) Compare your answer to (a) with the rate of energy transfer through 1.25 m2 of a single 1.0-cm-thick pane of glass. Disregard surface air layers. (Find the rate of energy transfer.) 
 kW
Jun 19th, 2015

Thank you for the opportunity to help you with your question!

a. 1.25 x 20.8/1

=26watts

b. 1.25 x 20.8/0.5

52/1000

0.052kw 

when it is single the  rate is double

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 19th, 2015

wrong 

Jun 19th, 2015

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