**book** > appendices

**Appendix A**

**Units and Symbols**

SI base units

SI derived units

Some unit conversion factors

Prefix for decimal multiples and submultiples of SI units

**Appendix B**

**Tables and diagrams**

Important constants

Periodic table of the elements

Greek alphabet

Conversion factors for pressure units

Conversion factors for throughput (flow rate)

Conversion factors for pumping speed (volumetric flow rate)

Physical properties of some gases

Vapour pressure and density of saturated water vapour in the temperature range 0-100 °C

Technical data of some diffusion pump oils

Components of atmospheric air

Graph of air pressure and temperature as a function of the altitude above the earth’s surface

Composition of air as a function of the altitude above the earth’s surface