Vapor pressure called partial pressure. For example, air at sea level, and saturated with water vapor at 20 °C, has partial pressures of about 2.3 kPa of water, 78 kPa of nitrogen, 21 kPa of oxygen and 0.9 kPa of argon, totaling 102.2 kPa, making the basis for standard atmospheric pressure. Vapor pressure is measured in the standard units of pressure. The International System of Units (SI) recognizes pressure as a derived unit with the dimension of force per area and designates the pascal (Pa) as its standard unit. One pascal is one newton per square meter (N·m or kg·m·s). Experimental measurement
ISO 3166-2:PA ISO 3166-2:PA ISO 3166-2:PA is the entry for Panama in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. Currently for Panama, ISO 3166-2 codes are defined for 10 provinces and 3 indigenous regions. Each code consists of two parts, separated by a hyphen. The first part is , the ISO 3166-1 alpha-2 code of Panama. The second part is either of the following: The codes for the provinces are assigned in