The rate at which a substance cools in moving air is proportional to the difference between the temperatures of the substance and that of the air. If the temperature of the air is 290 K and the substance cools from 370 K to 330 K in 10 min, when will the temperature be 295 K?

The rate of cooling of a substance in moving air is proportional to the difference of temperatures of the substance and the air. A substance cools from 36 degree celsius to 34 degree celsius in 15 minutes. Find when the substance will have the temperature 32 degree celsius , it being known that the constant temperature of air is 30 degree celsius.

A particular substance is being cooled by a stream of cold air (temperature of the air is constant and is 5^(@)C ) where rate of cooling is directly proportional to square of difference of temperature of the substance and the air. If the substance is cooled from 40^(@)C to 30^(@)C in 15 min and temperature after 1 hour is T^(@)C, then find the value of [T]//2, where [.] represents the greatest integer function.

A piece of copper and another of germanium are cooled from room temperature to 80 K . The resistance of