Statements (27)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:scientific_event
gptkb:metrology_milestone |
| gptkbp:affects |
gptkb:International_System_of_Units
|
| gptkbp:alsoKnownAs |
gptkb:New_SI
|
| gptkbp:approvedBy |
gptkb:General_Conference_on_Weights_and_Measures
|
| gptkbp:date |
20 May 2019
|
| gptkbp:goal |
improve precision and universality of SI units
|
| gptkbp:impact |
gptkb:industry
gptkb:science education metrology |
| gptkbp:location |
gptkb:Versailles,_France
|
| gptkbp:mainChange |
redefinition of four SI base units
|
| gptkbp:precededBy |
previous SI definitions (pre-2019)
|
| gptkbp:redefinedUnit |
gptkb:mole
gptkb:ampere gptkb:kilogram gptkb:kelvin |
| gptkbp:redefinitionBasis |
fixed values of fundamental physical constants
|
| gptkbp:redefinitionConstant |
gptkb:Planck_constant
gptkb:Avogadro_constant gptkb:Boltzmann_constant elementary charge |
| gptkbp:replacedBy |
artifact-based definitions
|
| gptkbp:bfsParent |
gptkb:International_System_of_Units
|
| gptkbp:bfsLayer |
6
|
| https://www.w3.org/2000/01/rdf-schema#label |
2019 SI redefinition
|