Pressure

Pressure is defined as the force per unit area exerted on a surface.[1]

Imperial units used for air pressure include:

* atmospheres
* pounds per square inch (PSI)
* inches of mercury, which is the number of inches the given pressure will raise a column of mercury

The SI unit for pressure is the pascal (Pa), where 1 Pa = 1 N • m−2. One atmosphere of pressure is equal to 101,325 Pa or 14.696 psi.

## See also[edit]

* blood pressure \- typically measured in millimeters of mercury

## References[edit]

1. ↑ Wile, Dr. Jay L. Exploring Creation With Chemistry. Apologia Educational Ministries, Inc. 1998