Heat is the form of energy that is transferred between systems or objects with different temperatures. Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Both conduction and convection require matter to transfer heat. If there is a temperature difference between two systems heat will always find a way to transfer from the higher to lower system.
The factor or condition that is necessary for heat transfer to occur is that two object 'must have different temperature'.
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Answer:
Heat is the form of energy that is transferred between systems or objects with different temperatures. Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Both conduction and convection require matter to transfer heat. If there is a temperature difference between two systems heat will always find a way to transfer from the higher to lower system.
The factor or condition that is necessary for heat transfer to occur is that two object 'must have different temperature'.