Newton's Law of Cooling

1. Suppose a cold coke can taken out of a refrigerator at \(38^\circ\)F is placed in a warm room at \(70^\circ\)F, and 10 minutes later the temperature of the can is \(46^\circ\)F. Find the temperature 22 minutes after the can was placed into the room. View Solution
2. An object with temperature \(72^\circ\)F is placed outside on a cold night where the temperature is \(-20^\circ\)F. At 11:05 PM the temperature of the object is \(58^\circ\)F, and at 11:07 PM its temperature is \(50^\circ\)F. At what time was the object placed outside? View Solution
3. Dr. Duncan is served a cup of coffee at \(175^\circ\)F. But he prefers to drink it at the temperature of \(162^\circ\)F so he waits for 2 minutes, and finds that the temperature of the coffee is \(167^\circ\)F. If the temperature of the room where he is sitting is \(70^\circ\)F, how long does he have to wait? View Solution