A loaf of bread is removed from an oven at 350° F and cooled in a room whose temperature is 70° F. If the bread cools to 210° F in 20 minutes, how much longer will it take the bread to cool to 190° F.
A) 4 min
B) 5 min
C) 17 min
D) 24 min

Question

Quizplus · Accepted Answer

Using Newton's Law of Cooling, the rate of cooling is proportional to the temperature difference between the object and the environment. The bread cools from 350°F to 210°F in 20 minutes, and using the same principle, it will take approximately 4 more minutes to cool from 210°F to 190°F.

A Loaf of Bread Is Removed from an Oven at 350°