The metre–tonne–second (MTS) system of units was invented in France (hence the derived unit names sthène and pièze) where it became the legal system between 1919 and 1961.[1] It was adopted by the Soviet Union in 1933 and abolished there in 1955. It was a coherent metric system of units, much as SI (itself a refinement of the MKS system) and the centimetre–gram–second system (CGS), but with larger units for industrial use, whereas the CGS system was regarded as onlyreally suitable for laboratory use.[2][3]
Units
[edit]The base units of the MTS system are:
Some common derived units:
- Volume: cubic metre or stere
- 1 m3 ≡ 1 st
- Force: sthène,
- 1 sn = 1 t⋅m/s2 = 103 N = 1 kN
- Energy: sthène-metre = kilojoule,
- 1 sn⋅m = 1 t⋅m2/s2 = 103 J = 1 kJ
- Power: sthène-metre per second = kilowatt,
- 1 sn⋅m/s = 1 t⋅m2/s3 = 103 W = 1 kW
- Pressure: pièze,
See also
[edit]- Foot–pound–second system of units (FPS)
- List of metric units
- Metre–kilogram–second system of units (MKS)
References
[edit]- ^ "Décret" 5 May 1961, "Journal Officiel"
- ^ "System of Measurement Units". IEEE Global History Network. Institute of Electrical and Electronics Engineers (IEEE). Retrieved 2011-03-21.
- ^ "Notions de physique – Systèmes d'unités" [Symbols used in physics – units of measure] (in French). Hydrelect.info. Retrieved 2011-03-21.