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.
Warmest days of the week ahead. 1  Harley-Davidson to lay off workers at York County plant. 2  How planting season affects your daily commute. 3  Police charge 18-year-old in York County woman's death.  Police: Death of man found in Pennsylvania pond 1  'suspicious'. 2nd suspect in Penbrook porch shooting turns himself in to police.