What is heat transfer? What are its positive and negative directions? Explain with the help of some examples.

Heat transfer refers to the movement of thermal energy from one object or system to another due to a temperature difference between them. The three primary mechanisms of heat transfer are conduction, convection, and radiation.

Conduction is the transfer of heat between two objects that are in direct contact with each other. For example, when you touch a hot stove, heat is transferred from the stove to your hand through conduction.

Convection is the transfer of heat through the movement of fluids, such ___ _______ ____ _______ ________ _______ ______ ______ __________ ______ _____.
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