Concept explainers
Time taken by the sun to melt the ice block
Answer to Problem 38P
Solution:
Explanation of Solution
Given Info:
Block of ice has horizontal area 1 m2 and thickness 1 cm. It is kept at 0 degree Celsius and angle made by sun rays with ice block is 35 degree. Emissivity of ice is 0.050.
Formula used:
For black body
Where is emissivity, is Stefan’s constant, A is radiating area and T is Temperature
Calculation:
Rate of energy absorption is calculated by
Mass of ice block is
Energy required to melt the ice
Time taken to melt the ice
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Physics: Principles with Applications
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