A cup of tea is initially at 80 °C

PHYSICS · Multi-part · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

A cup of tea is initially at 80 °C. Ten minutes later it is at 52 °C, and after twenty minutes it is at 40 °C. (i) Find the ambient temperature. (ii) Find the cooling constant kk (in min−1\text{min}^{-1}) correct to three decimal places.

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