Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!security!genrad!grkermit!masscomp!clyde!floyd!harpo!ihnp4!zehntel!hplabs!sri-unix!Alpern.Ibm-Sj@Rand-Relay From: Alpern.Ibm-Sj%Rand-Relay@sri-unix.UUCP Newsgroups: net.physics Subject: none Message-ID: <15670@sri-arpa.UUCP> Date: Tue, 17-Jan-84 13:49:18 EST Article-I.D.: sri-arpa.15670 Posted: Tue Jan 17 13:49:18 1984 Date-Received: Fri, 20-Jan-84 06:04:37 EST Lines: 12 From: David Alpern Ok, I stand corrected. The question of the relative densities of air and water vapor still feels funny to me, although on thinking about things obviously water vapor can't be denser at ground level pressure -- or we wouldn't have clouds. But we do, at times, have fog that sits rather than rises. Does anyone have the numbers at hand for the density of air and of water vapor under various near normal (atmospheric) temperature and pressure conditions? I wonder if the relationship between the densities doesn't "alternate" under various conditions.