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Math test 2

Math test 2 - 3.3 Heating and Cooling of Building 1 A cup...

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3.3. Heating and Cooling of Building. 1. A cup of hot coffee initially at 95 o C cools to 80 o C in 5 min while sitting in a room of temperature 21 o C. Using just Newton’s law of cooling, determine when the temperature of the coffee will be a nice 50 o C? 2. A cold beer initially at 35 o F warms up to 40 o F in 3 min while sitting in a room of temperature 70 o F. How warm will the beer be if left out for 20 min?

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3. A white wine at room temperature 70 o F is chilled in ice (32 o F). If it takes 15 min for the wine to chill to 60 o F, how long will it take for the wine to reach 56 o F? 4. A red wine is brought up from the wine cellar, which is a cool 10 o C, and left to breath in a room of temperature 23 o C. If it takes 10 min for the wine to reach 15 o C, when will the temperature of the wine reach 18 o C?
5. It was noon on a cold December day in Tampa: 16 o C. Detective Taylor arrived at the crime scene to find the sergeant learning over the body. The sergeant said there were several suspects. If they knew the exact time of death, then they could narrow the list. Detective Taylor took out a thermometer and measured the temperature of the body: 34.5

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