1 Aug
2006
1 Aug
'06
4:05 p.m.
<< If I remember my physics correctly, air pressure is approx. 14.7#/sq in, which is the weight of the entire column of air 1 inch square sitting on the square inch.
Not to be a nitpicker, but since "up" is not given by a parallel vector field, wouldn't the shape of this "air column" be more like a frustum of a 4-sided pyramid -- with a spherical "one-square-inch" top of radius R ~ Earth's radius, and a spherical base, of radius R+h (where h = maximum distance of relevant air from Earth) ? --Dan