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.
McKean County is a rural county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 43,450. Its county seat is Smethport. The county was created in 1804 and later organized in 1826. It was named in honor of former Pennsylvania Governor and Declaration of Independence signer Thomas McKean. McKean County comprises the Bradford, PA Micropolitan Statistical Area. It is located in a sparsely populated region known as the Pennsylvania Wilds, including the Allegheny National Forest and borders New York.