Heat is a form of energy which causes in us the sensation of hotness or coldness in our body
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i am little bit of satisfied with your answer
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This is the form of energy which produces rising in temperature while applied, as well as agitate the electrons in the subject, and rise the resistance.
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Heat is the result of the unpredictable motion of atoms and molecules in the object. The speed of collision between atomes and molecules in proportional to the level of heat. 
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Heat is a form of energy which flows due to the random motion of molecules constituting the body.