Re: [Phys-L] Hydrostatics question

[John Denker <jsd@av8n.com>]

On 07/21/2013 03:27 PM, Peter Schoch wrote:
> 1.  What is the "modern" law/principle that gives:  "...the spaces
> occupied by the same quantity of air, are reciprocally as the
> compressing forces…"

Ideal gas law.  PV = NkT

As a corollary, 
                 P1     V2
                ---- = ----
                 P2     V1

at fixed N and T.