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.
So Far, Philly Murder Rate Down in 2016. The combined January-February number was the second lowest of the last 10 years. So far in 2016, Philadelphiaâs murder rate is at its second-lowest number in the last 10 years. Even with two more homicides â including the death of a South Philly restaurant worker â added by end of day Thursday, the city has still recorded 39 homicides for the year.