Kilogramu yakozwe muburyo bwa silinderi, ifite agaciro cyane none ikinyejanawe ibizwe mu nkengero za Paris. Iri muri vacuo mu gikonoshwa kidasanzwe.
Hagati mu Gushyingo 2019, mu nzego zo mu 2019, mu nama ya 26 ya Biro y'Isi n'Iminzani, abahanga bazahitamo gusimbuza Le Grand K ku buryo bwizewe.
Ibipimo bifite imiterere ya silindrike hamwe na diameter fatizo n'uburebure bwa mm 39, 90% bigizwe na Platine, na 10% biva muri Iridium. Hamwe na we ko viscos zose zigereranywa niyi si. Afite kopi ziherereye ku isi mu bigo bya Leta bya metero. Noneho igice rusange nicyo cyonyine muri sisitemu mpuzamahanga yingamba, bikurwa mubintu byashyizweho numuntu. Ibindi bice byiyi sisitemu birashobora kuboneka ukoresheje amategeko ya fiziki. Ariko ntabwo ari igihe kirekire.
Impamvu yacyo niyo yabuze atome yikibuga cyerekana, nkibisubizo byimisabusa. Noneho ko bingana nabandi kopi yikiro (ibi bituma buri myaka 40), ibisubizo bizaba bitandukanye. Ibi birashobora kuganisha kubibazo bikomeye munganda, aho igipimo cyukuri ari ngombwa cyane.
Hariho uburyo burangwa nukuri. Mu 1975, Dr. Bryan Kibble mu Bwongereza, niko witwa "vetta-umunzani" mu 1975. Biraba ari ukubera ko imbaraga zimbaraga za electromagnetic zipimwa, zishobora gupimwa nukuri. Ibi bisaba ibikoresho bigoye kandi bihenze. Kubikoresho bya laboratoire, ishoramari rinini rirakenewe, ariko uku kuvura bizemera kubona uruganda ruhoraho.
Ingingo ku ngingo: Kurekura ibikoresho - Icyiciro gishya cy'iterambere vipp