2 Units

Basic SI units are kilogram (kg), meter (m), and second (s). Many derived units exist. The book uses kPa, kJ, kW instead of the ``normal'' units Pa, J, W. Conversions may be needed (inside back-cover.)

Definitions: 1 bar = $10^5$ Pa. 1 atm = 101,325 Pa.

Absolute temperature (required in most formulae and some tables): add 273.15 to convert Centigrade into Kelvin, substract 273.15 to convert Kelvin into Centigrade. However, temperature differences are the same in Kelvin as in Centigrade; the two temperatures in the difference do not need to be converted.