Giancoli's Physics: Principles with Applications, 7th Edition

14-1: Heat as Energy Transfer
14-3 and 14-4: Specific Heat; Calorimetry
14-5: Latent Heat
14-6 to 14-8: Conduction, Convection, Radiation

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 36
Q

# Calculate the rate of heat flow by conduction through the windows of Example 14–8, assuming that there are strong gusty winds and the external temperature is $-5 ^\circ \textrm{C}$.

A
$1.6 \times 10^4 \textrm{ W}$

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VIDEO TRANSCRIPT

This is Giancoli Answers with Mr. Dychko. The rate of heat transferred by conduction through the window will be the thermal conductivity of glass times the window's area times the difference in temperature between inside and outside divided by the thickness of the window. So, that's 0.84 joules per second meter Celsius degree times its area of 2 meters times 1.5 meters. And then it's 15 degrees inside the window and minus the negative 5 degrees Celsius outside and divided by 3.2 times 10 to the minus 3 meters thickness of the window. And that gives about 1.6 times 10 to the 4 or watts is the rate of heat transfer by conduction.

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