How does cold transfer if it’s just the absence of heat?
In: Physics
Others have covered thermodynamics. There is a slight/not-really-exception to this which is convection. Warm gasses rise causing cooler gasses to fall, meaning in a tall room, the cold comes down. Also if you open a door on a windy day, physically cold air may blow in and replace your warm air. In a closed system the warm air would give its heat to the cold air in time, but this is why it annoys me that “smart” people poke fun at the commonly said “you’re letting the cold in”. You can absolutely let cold air in.
/end rant.
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