Assignment:
An imaginary dimensionless room has a ceiling fan that moves 10 cubic feet of air per minute. Assuming the air flow is directed downward at a temperature of 65 degrees F there are 3 materials below at which the ceiling fan air is directed:
1) A 1 gallon container of water at 140 degrees F
2) A 1 pound block of wood at 220 degrees F
3) And a piece of bread/toast weighing 0.1 lbs at 150 degrees F
Calculate the amount of time needed to cool each of the 3 materials above to 65 degrees F?
Provide complete and step by step solution for the question and show calculations and use formulas.