Question:
A copper sphere cools from 62°C to 50°C in 10 minutes and to 42°C in next 10 minutes. Calculate the temperature of surroundings.
A copper sphere cools from 62°C to 50°C in 10 minutes and to 42°C in next 10 minutes. Calculate the temperature of surroundings.
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Use temperature differences, not absolute values.
Updated On: Mar 18, 2026
- 18.01°C
- 26°C
- 10.6°C
- 20°C
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The Correct Option is B
Solution and Explanation
Step 1: Newton’s law of cooling.
Rate ∝ temperature difference.
Step 2: Solve ratios.
Ambient temperature = 26°C.
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