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.
In Philly, the most popular months are May, June, September, and October. Sometimes July and August are included in there, too. Most of the venues charge higher minimums or rental fees for the more popular months, and sometimes you can get a discount if you do January-March.