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ISO 80000-3:2006 is an "ISO standard entitled Quantities and units – Part 3: Space and time, superseding "ISO 31-1 and "ISO 31-2.[1] It is a part of the group of standards called "ISO/IEC 80000, which together form the "International System of Quantities.

Contents

Contents list[edit]

The standard is divided into the following chapters:

  1. Scope
  2. Normative references
  3. Names, symbols and definitions

Names, symbols and definitions[edit]

Space and time[edit]

Space[edit]

ISO 80000-3:2006 assigns names and symbols to quantities and units of space and time, and defines these quantities and units. For example,

Units of length, area and volume[edit]

Other units of distance defined by the standard are the "ångström (symbol Å) (10−10 m) and the "nautical mile (1852 m). No symbol is given for the nautical mile.

The "are (symbol a) is a unit of area equal to 100 square metres.

The "litre (symbol L or l) is a unit of volume equal to 10−3 m3.

Units of angle[edit]
Quantities[edit]

Time[edit]

ISO 80000-3:2006 assigns names and symbols to quantities and units of space and time, and defines these quantities and units. For example,

Units of time, speed and acceleration[edit]

Other units of time defined by the standard include the "minute (1 min = 60 s), the "hour (1 h = 60 min) and the "day (1 d = 24 h). The "year (1 a = 365 d or 366 d) is defined in an informative annex.

Quantities[edit]

The "standard acceleration of free fall is 9.806 65 m/s2.

Logarithmic quantities and units[edit]

Units of "level defined by ISO 80000-3:2006 are:

Annex A (informative)[edit]

The following CGS units are deprecated:

Annex B (informative)[edit]

The following non-SI units are deprecated by the standard:

Annex C (informative)[edit]

The following non-SI units are given for conversion. They are not deprecated by the standard:

References[edit]

  1. ^ "ISO 80000-3:2006". "International Organization for Standardization. Retrieved 20 July 2013. 
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