Concept explainers
(a)
The temperature of the leaf.
(a)

Answer to Problem 85P
The temperature of the leaf is
Explanation of Solution
Write the expression for Stefan’s law of
Here,
Re-arrange the expression to find the temperature.
Substitute
Here,
Conclusion:
Substitute
(b)
The power per unit area need to be lost by other methods to keep the temperature at
(b)

Answer to Problem 85P
The power per unit area need to be lost by other methods to keep the temperature at
Explanation of Solution
The one side of the leaf, the bottom side can be neglected because it absorb and emit in same rate.
Write the expression to find the power per unit area need to be lost.
Here,
Re-arrange the expression to find the power per unit area need to be lost.
Conclusion:
Substitute
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Chapter 14 Solutions
PHYSICS
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