Definition. The partial pressure of a given gas is defined as the pressure exerted by that gas alone. For example, consider the gaseous mixture of oxygen, nitrogen, carbon dioxide, and water vapor, the typical mixture found in alveolar gas.
From Wikipedia, the free encyclopedia. Philadelphia County is a county located in the commonwealth of Pennsylvania. At the 2010 census, the population was 1,526,006, making it the most populous county in the state, despite being the second smallest county in the state by land area.
Check out the Technical.ly Jobs Board. Comcast is the 17th largest employer in Philadelphia as of the second quarter in 2012, according to data from the state. The communications giant also made lists for Delaware County (#49), Bucks County (#39), Montgomery County (#35) and Chester County (#22).