Re: pinhole Sierra questions

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From: Geoff Ruth (gruth@leadershiphigh.org)
Date: Tue Jun 25 2002 - 21:01:39 PDT 

Message-Id: <a05010408b93ec31684cd@[192.168.1.5]>
Date: Tue, 25 Jun 2002 21:01:39 -0700
From: Geoff Ruth <gruth@leadershiphigh.org>
Subject: Re: pinhole Sierra questions

Paul,

I was just watching the Paul Hewitt video on gases, and he said that
at an altitude of 5.6 km in height, one-half of the atmosphere will
be underneath you. In a previous pinhole e-mail, you said that at
15,000 feet, you're above half the atmosphere.

Paul vs Paul . . . the battle to the final answer?

- Geoff

>The simple rule of thumb for lower elevations (below 15,000 feet (Which is
>great for the continental US for which the high point, Mt. Whitney is below
>15,000 feet.) is to subtract an inch of mercury for every 1000 feet of
>elevation gain.
>
>So at 15,000 feet you subtract 15 inches of mercury from sea level 30
>inches of mercury and find you are above 1/2 of the atmosphere.

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