MHT CET 2025 Physics question
A body cools from C to C in 5 min. In the next time of ‘t’ min, the body continues to cool from C to C. The total time taken by the body to cool from C to C is [The temperature of the surroundings is C.]
Answer: (C)
Solution
Use Newton's law of cooling with the average temperature of each stage: . Stage 1: , so and $k =
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