Metre-tonne-second system of units
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The metre-tonne-second or mts system of units is a system of physical units. It was invented in France, hence the unit names sthène and pièze, and was only ever adopted by the Soviet Union in 1933 and soon abolished in 1955. It was built on the same principles as the cgs system, but with larger units for industrial use. The cgs system on the other hand was regarded as suitable for laboratory use only.
Units
The base units of the mts system are as follows:
- length: metre
- volume: stère
- ; 1 st := 1 m³
- mass: tonne,
- ; 1 t := 10³ kg
- time: second
- force: sthène,
- ; 1 sn := 1 t·m/s² = 10³ N
- energy: kilojoule,
- ; 1 kJ := 1 t·m²/s² = 10³ J
- power: kilowatt,
- ; 1 kW := 1 t·m²/s³ = 10³ W
- pressure: pièze,
- ; 1 pz := 1 t/m·s² = 10³ Pa
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