A cup of coffee is served at 90 °C in a room whose temperature is 25 °C
PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
A cup of coffee is served at 90 °C in a room whose temperature is 25 °C. After 10 minutes, the coffee has cooled to 70 °C. Assuming Newton’s law of cooling, determine the cooling constant k (per minute) correct to four significant figures.