If you open a door to the cold outside in a warm inside does warm air go out or does cold air come in?

Answer 1

In theory, the cold air would want to slide under the warm air, but it's such a small scale that all that would really happen is there would be an exchange of both warm and cold air, and you'd waste energy in the process. You won't be able to observe very much if you're just opening a door.

Answer 2

well if your parents have ever scolded you in the winter and said "Close the door you're letting all the cold air in" that would answer the question because wind pushes the cold air in. well if your parents have ever scolded you in the winter and said "Close the door you're letting all the cold air in" that would answer the question because wind pushes the cold air in.

Answer 3

Speaking physics, cold moves toward hot, so the air from the cold room will move into the hot air room. Because we are talking about an open doorway here, the laws of fluid dynamics comes into play also, and some on the warm air will be displaced into the colder room. Eventually, considering the conditions in each room are essentially static, both room temperatures will equalize and balance to an average temperature of both.

Answer 4

Both. Heating and cooling deal with energy gained and lost on a quantum to molecular scale (smaller than an atom up to molecules) where the wavelength in this case infrared or larger decides how "hot" an atom is. In the case of air currents on a planet the acting heat energy source is infrared energy, the wavelength of this energy causes atoms and molecules to vibrate, this vibration leads to friction of the particles which causes heat (by the way microwaves cause molecules to rotate and our microwave ovens are set to an energy level that causes water molecules to rotate that's why heating something with no water in it (literally no water molecules) to not heat. When cold air is heated it expands as the atoms and molecules bump into each other causing friction raising temperature and air pressure, pressure and temperature are directly related so as temperature increases so does pressure, and because hot air is less dense the air rises. The rate is determined, in part, by the amount of energy being added, as it gets further and further from the energy source the atoms and molecules start to lose energy and as they give off energy to their surroundings they get less and less excited. The more they settle they bump into each other less and air pressure drops and temperature with it as well as the air since cold air sinks due to cold air being more dense than hot.

All of this can be explained much more simply, if you choose, by accepting that this process you are asking about is called convection, and none of the air is ever standing still because the cycle never stops meaning that hot air is moving into cold and cold air is moving into hot, on any scale but when looking at air currents these are what Hadley cells, Mid-Latitude cells, and Polar cells are. The amount of energy from the sun, given back off from the earth in the form of infrared light (heat) is greatest at the equator and gets weaker the closer to the poles you are. Starting at the Equator the air is heated and rises then due to gravity and cooling it hits a ceiling where it begins to move into the colder air of the upper latitudes. Eventually (around 30 degrees North and South) it cools, sinks and moves back across the Earth to the Equator where having absorbed more energy it begins the cycle again. The Mid-latitude cells operate in a reverse direction of the Hadley cells so that both drop their cold air around 30 degrees N&S with their hot air rising around 60 degrees N&S. The Polar cells operate in a reverse direction of the Mid-latitude cells with air rising around 60 N&S and dropping at the Poles.

There you go both macro and micro, hope this helps

Answer 5

no way,this is a myth

Answer 6

True