Heat is the transfer of kinetic energy from one object to another. According to the 2nd Law of Thermodynamics, heat always transfers from a hot object to a cold one, never the reverse.
Heat, in Physics heat is not in inside an object but heat is the transfer of energy from one object to another so when you touch an object and it feels hot, what you're feeling is the heat you're feeling the energy being transferred from that hot object to your hand and that energy once it's in your hand it's not making your hand hot it's transferring internal energy so when we talk about heat we're really talking about the transfer of energy from one object to another and heat always goes from hot to cold never the other direction right.
Heat is also a relative term, if my hands are ice cold and I stick them in cold water, that water feels hot because that water has more energy than my hands, if my hands are very warm and I stick them in cold water, that water feels really cold because now my hands are warming up that cold water so heat is relative but it's always a transfer of energy from an object with more energy to an object with less energy.
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M.Ed., George Washington University
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