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
Comparison of Object Pascal and C (if it has to be), i.e., its storage management is handled by the compiler (or more accurately, by the runtime code inserted by the compiler in the executable). String concatenation is done with the codice_65 operator, and string comparison can be done with standard relational operators (case sensitive): codice_66. Object Pascal also provides C-compatible strings under the type codice_67, with manipulation routines defined in the codice_68 unit. Moreover, Object Pascal provides a wide variety of string types: For convenience, the plain codice_76 type is provided, which, depending on a compiler switch, could mean codice_69, codice_71 or codice_74. An additional convention