My SO said the above statement and gave me an explanation “Cold is the absence of heat or energy”, it does make sense however in my head it is like saying (in very simplistic terms) “the countryside is the absence of a city” and that is just a ridiculous statement.
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The not so ELI5… Heat is a measure of enthalpy in a substance. Which is to say, it’s the measure of the average random kinetic molecular energy within something. On an atomic scale, things vibrate and bump into each other. The faster they vibrate, the more they bump. The more they bump, the more energy they transfer into their surroundings. Absolute zero then is the point at which all vibrations stop. “Cold” is a relative term that just means less molecular energy than some other thing. Refrigeration works by transferring some of the energy out of your food and into your kitchen.
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