At 4:00pm, a thermometer reading of 28 deg C is taken outside where the ambient temperature is –11 deg C. At 4:05 pm, the thermometer reads 8 deg above zero. After a while, the thermometer is returned to the room maintained at 28 deg C. At 4:12pm, the thermometer reads 15 deg C. When was the thermometer returned to the room?
At 4:00pm, a thermometer reading of 28 deg C is taken outside where the ambient temperature is –11 deg C. At 4:05 pm, the thermometer reads 8 deg above zero. After a while, the thermometer is returned to the room maintained at 28 deg C. At 4:12pm, the thermometer reads 15 deg C. When was the thermometer returned to the room?
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.2DP
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APPLICATIONS OF FIRST ORDER DIFFERENTIAL EQUATIONS
Newton’s Law of Cooling and Joint Proportions
At 4:00pm, a thermometer reading of 28 deg C is taken outside where the ambient temperature is –11 deg C.
At 4:05 pm, the thermometer reads 8 deg above zero. After a while, the thermometer is returned to the room
maintained at 28 deg C. At 4:12pm, the thermometer reads 15 deg C. When was the thermometer returned to
the room?
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