Atmosphere (unit) for the purposes of specifying the physical properties of substances, “"standard pressure"” should be precisely . A pressure of 1 atm can also be stated as: Scuba divers and others use the word "atmosphere" and "atm" in relation to pressures that are relative to mean atmospheric pressure at sea level (1.013 bar). For example, a partial pressure of oxygen is calibrated typically using air at sea level, so is expressed in units of atm. The old European unit technical atmosphere (at) is equal to 1 kilogram-force per square centimetre (kgf/cm), Pa. Atmosphere (unit) The standard atmosphere (symbol: atm) is a
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