Concept explainers
(a) To determine:
Power radiated ifsphere is kept at 25°C
Answer to Problem 37P
Solution:
71 W
Explanation of Solution
Given Info:
Radius of tungsten sphere is 19 cm and emissivity is 0.35
Formula used:
For black body
Where is emissivity, is Stefan’s constant, A is radiating area and T is Temperature
Calculation:
Power emitted by the sphere can be calculated as
(b) To determine:
Sphere enclosed in room whose walls are at -5°C
Answer to Problem 37P
Solution:
25 W
Explanation of Solution
Calculation:
Rate of flow of energy out of the sphere can be calculated as
Chapter 14 Solutions
Physics: Principles with Applications
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