Question

Kareem heats a beaker of water to boil. Then he records that the water temperature decreases from 100 c to 19 c in 5 2/5 minutes. What was the average change in temperature each minute ?

Answer 1

`(\Delta T)/(\Delta t) = -15\,(^(\textdegree)C)/(min)`

Explanation:

The average change in temperature is:

`(\Delta T)/(\Delta t) = (19\,^(\textdegree)C-100\,^(\textdegree)C)/((27)/(5)\,min )`

`(\Delta T)/(\Delta t) = -15\,(^(\textdegree)C)/(min)`