Monday, November 15, 2010

Sub-Zero

Like clockwork, now that it's mid-November, sub-zero weather has arrived in Fairbanks.  Tonight the temperature dips down to -5, and tomorrow we have -20 degrees to look forward to.
How long does it take hot water splashed onto the windshield to freeze?  Less than two seconds.  Not. Kidding.
Ice fog: Fact or Fiction?  Ice fog develops when warm water vapor (from car exhaust, exhaled breath, etc) meets super-cold air, causing microscopic ice crystals to form in the air.  The frigid air can't absorb these ice crystals which congregate to form a dense cloud.  When it dips down to -30 degrees, I'll be sure to run outside just to exhale and watch my breath form a tiny cloud of ice fog that doesn't dissipate.
Does wet hair freeze when you go outdoors in sub-zero weather? I'm not brave enough to perform this experiment.
How short are the days? Today we had 6 hours 16 minutes of daylight, and each day gets progressively condensed by 7 minutes.  By winter solstice on December 21, daylight will only last for 3 hours 42 minutes [Please, sir, may I have more vitamin D?]

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