As an example, consider a unit area of 1 square inch. At sea level, the weight of the air above this unit area would (on average) weigh 14.7 pounds! That means pressure applied by this air on the unit area would be 14.7 pounds per square inch.Meteorologists use a metric unit for pressure called a millibar and the average pressure at sea level is 1013.25 millibars.t sea level, the weight of the air above this unit area would (on average) weigh 14.7 pounds! That means pressure applied by this air on the unit area would be 14.7 pounds per square inch. Meteorologists use a metric unit for pressure called a millibar and the average pressure at sea level is 1013.25 millibars.
Troup, Texas. Troup is a city in Smith and Cherokee counties in the U.S. state of Texas. The population was 1,869 at the 2010 census. Troup lies in two counties as well as two core based statistical areas.
Map of Presidio County, Texas and the counties of Brewster, Buchel, Foley, and Jeff Davis created from Presidio in 1887. Buchel and Foley were abolished and joined to Brewster in 1897. W. F. Mitchell built the first barbed wire fence in the county at Antelope Springs in 1888.