👉 In the context of thermodynamics and heat transfer, "hotness" refers to a measure of the temperature difference between two points. It is often used in the field of fluid mechanics or heat transfer engineering to quantify how much heat is transferred from one region to another. In simple terms, if you have two different substances at different temperatures, their hotness will be determined by how much energy they absorb or emit during a specific process. The higher the temperature difference between two points, the more heat is
