International Prototype of the Kilogram
GPTKB entity
Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
physical artifact
|
| gptkbp:alsoKnownAs |
gptkb:IPK
|
| gptkbp:category |
metrology
measurement standards |
| gptkbp:countryOfOrigin |
gptkb:France
|
| gptkbp:created |
1889
|
| gptkbp:diameter |
39 mm
|
| gptkbp:height |
39 mm
|
| https://www.w3.org/2000/01/rdf-schema#label |
International Prototype of the Kilogram
|
| gptkbp:location |
gptkb:International_Bureau_of_Weights_and_Measures
gptkb:Sèvres,_France |
| gptkbp:mass |
1 kilogram
|
| gptkbp:material |
platinum-iridium alloy
|
| gptkbp:numberOfNationalCopies |
40
|
| gptkbp:numberOfOfficialCopies |
6
|
| gptkbp:owner |
gptkb:International_Bureau_of_Weights_and_Measures
|
| gptkbp:purpose |
define the kilogram
|
| gptkbp:replacedBy |
definition based on Planck constant
|
| gptkbp:retired |
2019
|
| gptkbp:shape |
cylinder
|
| gptkbp:usedAs |
standard of mass
|
| gptkbp:bfsParent |
gptkb:kilogram
|
| gptkbp:bfsLayer |
5
|