can objects be colder than air temperatu?
453393
Yes.  That's why the evaporator coils of a refrigerator or freezer get frosted.
192816
yeah.  if it's 200 degrees F it won't freeze very fast, but if it's 33 degrees F it will
10868
It could, because it doesn't need to be freezing on the GROUND, only in the air, for the moisture in the air to crystalize and fall. It would melt, of course.
51534
It all depends on the enviroment.  Obviously in a cooler environment it will take a lot longer to mold than in a warmer one.
209676
Neither can freeze.  Boiling water is 200+ degrees F.  Room temp is roughly 70 degress F.  Now, if you meant does something at room temp freeze faster than something that is at boiling (water), then the answer is, in general, yes.
586003
Air Pressure.  The humidity and such in the air is higher and therefore holds more warmth.\n\nAt higher altitudes, where the air is less dense, there is greater distance between particulates and heat is lost faster.
330911
A system cooled by liquid nitrogen
957050
all things have a solid liquid and gas state. it just depends on the temperature.
582102
Air is denser the lower you go on the earth, due to gravity pullin gthe air down. As you move up, there is more "room" for the air to expand. Air temp is just the measure of the net kinetic energy of the molecules of air. The faster and more there are, the hotter it is. therefore, as the air expands as it moves up into the atmosphere, it cools. On top of a mountain, there is less molecules actually hitting your skin, so it feels very cold.
699168
No it's not possible. 0 Celsius is still 273.15 Kelvin.
741531
some cold, some hotter
182135
A parcel of unsaturated air that rises in the atmosphere will cool by 1C per 100 m.\n\nSo if your parcel is 30C at the surface, it will be 20C at 1000 m.  However, if the water vapor in the air condenses before it has reached 1000 m, the answer would be different (and the answer would depend on the humidity of the air).
1031939
temperature decreases with increase in altitude
670061
Things that freeze at temps lower than about 75K.\nOxygen\nMethane\nhydogen\nhelium\netc
30315
Well absolute zero is -273.15 C or so, and we have gotten very close to that (within about a tenth of billionth of a degree C). We cannot get any colder than absolute 0. \n\nThere is such a thing as negative temperature, but this is not a case of something being colder than absolute zero, but "hotter than infinite temperature". See the attached web pages.
69181
To answer your question simply - \n\nWind chill measures HOW FAST the object loses its heat energy due to the wind - however, it will not remove more energy than is in the wind - but it will quickly reduce the temperature of an object to the actual temperature of the wind. On a person, the loss due to evaporation will make it feel colder. However, on an inanimate object, such as water, It's not going to affect the core temperature, and therefore, it will not aid in the production of snow.\n\nOn a side note - the snow machines are made to produce snow at temperatures higher than 32, because part of their job is actually to remove energy from the water. So, they probably work regardless of the temperature - however, once the snow is on the ground, higher temperatures might cause it to melt sooner.  Snow can be made at temperatures higher than 60F - People do it all the time - X Games, movies, snowboarding stunts in the middle of summer. The actual temperature that snow could be made would be based on the ratings of each snow machine, and how much energy it could actually remove from the water.
556156
If it's non heated, it's going to be the temperature of the surrounding air and ground.