Concept explainers
(a)
The rate of heat flow through the wall.
(a)
Answer to Problem 59P
The rate of heat flow through the wall is
Explanation of Solution
Write the expression for the thermal resistance foe the material.
Here,
Write the expression for the thermal resistance of the insulation.
Here,
Write the expression for the rate of heat of flow.
Here,
Substitute equation I and II in equation III,
Conclusion:
Substitute
Therefore, The rate of heat flow through the wall is
(b)
The amount of heat flows out of the wall.
(b)
Answer to Problem 59P
The amount of heat flows out of the wall is
Explanation of Solution
Write the rate of heat flow.
Here,
Write the expression for the thermal resistance of the glass.
Here,
Substitute equation VI in equation V,
Write the expression for the total rate of heat flow.
Here,
Conclusion:
Substitute
Therefore, the amount of heat flows out of the wall is
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