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    Re: Artificial horizons and mercury
    From: Jared Sherman
    Date: 2003 Jul 21, 13:20 -0400

    George-
     While the Broolyn CUNY page is unprofessional, you might want to look at Q 
    and S as described again, and I believe you will see where their formula is 
    intended to go. They describe S based on the floor space, so as to describe 
    how many micrograms of mercury boil into into the cubic atmosphere of the 
    room, from the planar surface of the floor. It is very much a similar term of 
    micrograms boiled off the planar floor surface, micrograms in the cubice 
    volume of the air, and micrograms going out with every air change.
     AFAIK room air changes are described as by the hour in the US, so that air 
    flow rate would be cubic meters per hour in a normal environment. Room air 
    may change from 1x-6x per hour with the former being a well insulated (aka 
    "sick home") space and the latter being a nicely fresh one.
    
    Even the formula they give just doesn't include all the constants they have on 
    hand, or need. But there is nearly enough meat on the page to work out the 
    rest.
    
    We would need to assume the room is a standard 8 feet (2.6m) in height, as 
    that is the standard residential or office ceiling height in the US. Now, we 
    have square meters of floor space and cubic meters of air volume meshing.
    
    And the rest becomes a simple exercise left for the reader.
    
    Ah, poor CUNY, this won't do their reputation any good.
    
    
    

       
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