Why does humid air rise? How can the addition of water vapor make it lighter? When I take a dishrag and wet it, it gets heavier; how can I take a parcel of air, add water, and thereby make it lighter? This is all nonsense! (I suppose this lesson should have come before the one [...]
Posts Tagged ‘fog’
Why humid air rises
Posted in Meteorology, tagged drops, fog, humidity, Orders of magnitude in weather, vapor on November 3, 2009 | Leave a Comment »
How big is a raindrop?
Posted in clouds, Meteorology, tagged fog, raindrop on October 11, 2009 | Leave a Comment »
Is this a reasonable question? Can’t drops come in all sizes? Raindrops can come in many sizes, but nothing comes in “all” sizes. Basically, the size range for falling-out-of-a-cloud raindrops is between 5 millimeters (mm) and 1/2 mm. Five millimeters is about a quarter of an inch; 1/2 mm, or 0.5 millimeter, is 1/25th of [...]
Relative humidity & Dew point
Posted in assignments, Meteorology, tagged dew point, fog, relative humidity on October 4, 2009 | Leave a Comment »
Define relative humidity and dew point. “In the end, the temperature doesn’t generally fall below the afternoon’s dew point, just because of the warming effect of making the dew.”
Notice the universe!
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