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Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 17 - Thermal Properties of Matter > A body cools from 50 degree c to 49.9 degree c in 5 s. How long wil take to cool from 40 degree c to 39.9 degree c ? ( Assume the temperature of surrounding to be 30 degree c and Newton’s law of cooling to be valid )

A body cools from 50 degree c to 49.9 degree c in 5 s. How long wil take to cool from 40 degree c to 39.9 degree c ? ( Assume the temperature of surrounding to be 30 degree c and Newton’s law of cooling to be valid )

A beaker full of hot water is kept in a room. If it cools from 80 degree C to 75 degree C in t1​ minutes from 75 degree C to 70 degree C in t2​ minutes and from 70 degree C to 65 degree C in t3​ minutes then