1. Exaust from the tailpipes of automobiles, even though it is 250 degrees when it comes out of a vehicle, cools to minus 40 in less than 10 seconds.
2. dry snow at 40 below is cold enough to prevent skis from gliding(the air is so cold it prevents friction between the ski and the snow, thus eliminating any chance of melt-water which makes a ski glide.)
3. the red liquid within outdoor thermometers is alcohol, not mercury. mercury freezes at 38 below.
4. 40 below zero is the only point at which the fahrenheit and celsius thermometers agree.
5. at 40 below a train more than 5 miles away will sound as if it is a block down the street because of temperature inversion (the inversion, created when warm are rests on top of colder air, acts as a tunnel in which sound waves bounce for great distances.)
6. A raven's (black bird) hyper-metabolism will keep its body temperature at 107 degrees at 40 below.
7. the Fairbanks North Star Borough has no official temperature cut-off, so school is rarely closed due to cold weather.
8. Propane turns from a gas to a liquid at 44 degrees below zero - thus preventing one from being able to heat with it.
9. Furnace heating fuel (#1) stops flowing adequately at abouut 60 below Fahrenheit
10. at 45 degrees below zero, keys can snap off in door locks, and fan belts on automobiles can disintegrate.
11. "square tires" are a natural phenomenon in the winter. at sub zero temperatures a car that has been parked for more than an hour will have tires that are flat on one side - where the tire meets the ground. the tires usually round back out within a mile of driving.
12. your can actually break your hair off when walking outside with wet hair at 40 below!
Neat
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