Slice of cheese is 3.0°c and is sitting on a dish that is 3.0°c.
if the dish and cheese are in a refrigerator that is set to 3.0°c, which of the following statements is true?
a. heat will not flow because there is no temperature difference between the substances.
b. the temperature of the air in the refrigerator will decrease and the temperature of the cheese will increase.
c. the temperature of the cheese will increase and the temperature of the dish will decrease.
d. heat will flow from the air in the refrigerator

The correct answer is option A

The heat will not flow because there is no temperature difference between the substances. The cheese, the dish and the refrigerator are having the same temperature so there will be no heat flow. For the heat flow there must be temperature difference between the substances and here there is no temperature difference so there will be no heat flow.

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