Newsgroups: sci.physics
From: hoey@zogwarg.etl.army.mil (Dan Hoey)
Date: 16 Jan 92 16:39:51 GMT
Subject: Re: Air density

sh...@eos.arc.nasa.gov (Richard Barry Shrum) writes:

>Does anyone have the answer to what the correlation of atmospheric
>pressure (~14.7 psi sea level) is to air density? What is normal air
>density on earth at sea level?

acamp...@magnus.acs.ohio-state.edu (Angelo Campanella) replies:

>Some simple facts:
>1/ normal sealevel air density is 1.2 kg/cubic meter; you figure it out for
>PCF, etc.  I say a pound per cubic yard and let it go at that.

Certainly you mean 2 lb/yd^3.

Also, you'd better keep track of gas content.  On hot, humid days the
density decreases significantly due to water content.  Significantly
enough to impede aircraft takeoff, according to pilots.

Dan Hoey
Hoey@AIC.NRL.Navy.Mil