4. A cup of coffee at temperature P cools at a rate proportional to the difference between its temperature and the surrounding temperature Po. Show that P = the cooling rate constant and A is the integral constant. A cup of coffee at 80°C is left in Ae-kt + Po , where k is a room at 20°C a) Find the cooling equation. b) It is found that after 20 minutes in the room, the temperature of the coffee has decrease by 20°C. Determine the temperature after 30 minutes

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4. A cup of coffee at temperature P cools at a rate proportional to the difference between its
temperature and the surrounding temperature Po. Show that P =
the cooling rate constant and A is the integral constant. A cup of coffee at 80°C is left in
Ae-kt
+ Po , where k is
a room at 20°C
a) Find the cooling equation.
b) It is found that after 20 minutes in the room, the temperature of the coffee has
decrease by 20°C. Determine the temperature after 30 minutes
Transcribed Image Text:4. A cup of coffee at temperature P cools at a rate proportional to the difference between its temperature and the surrounding temperature Po. Show that P = the cooling rate constant and A is the integral constant. A cup of coffee at 80°C is left in Ae-kt + Po , where k is a room at 20°C a) Find the cooling equation. b) It is found that after 20 minutes in the room, the temperature of the coffee has decrease by 20°C. Determine the temperature after 30 minutes
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