On a cold day when someone leaves an outside door open, it is often said that the person is letting in cold air. Is this correct? Explain.
2007-10-05 05:30:35 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Well if you'd like to get really technical about it there is no such thing as cold. There is heat and absence of heat. When a door is left open and the room is warmer than outside then the temperatures will naturally try to reach an equilibrium and the room will get colder and outside will get warmer. Of course considering how much air "outside" is there really isn't a noticeable change, but the size of the room is most likely small enough that you will notice the change in temperature and it could be described as letting in cold, though I would go with letting out the heat.
2007-10-05 06:19:10 · answer #1 · answered by Matt C 3 · 0⤊ 0⤋
Warm air rises. If you leave the door open the warm air from the room goes out the top of the door and is replaced by the colder air coming in from the bottom.
2007-10-05 13:09:32 · answer #2 · answered by paul 7 · 0⤊ 0⤋