MHT CET 2026 Physics question
A body cools in 7 minutes from 60C to 40C. What time (in minutes) does it take to cool from 40C to 28C, if the surrounding temperature is 10C ? (Newton's law of cooling holds good)
Answer: (D)
Solution
Newton's law (average form): . First interval: , so per minute. Second interval: $ = k( - 10) =
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