1.

In a house the temperature at the surface of a window is 25^(@)C The temperatuere outsideat the window surface is 5.0^(@)C .Heat is lost through the window via conduction, and the heat lost per second has a certain value. The temperature outside begins to fall, while the conditions inside the house remain the same. As a result, the heat lost per secondincreases. What is the temperatureat the outside window surface when the heat lost persecond doubles ?

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ANSWER :15


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