Heat and Thermodynamics 3 Question 33
33. A solid copper sphere (density and specific heat ) of radius at an initial temperature is suspended inside a chamber whose walls are at almost . The time required for the temperature of the sphere to drop to is ……
(1991, 2M)
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Solution:
- Area of sphere,
Mass of sphere,
Now, energy radiated per second
or
or
Substituting the values,