Kilogram

Ma'auni ne da ake amfani da shi sosai a fannin kimiyya, injiniyanci da kasuwanci a duk duniya, kuma galibi ana kiransa kilo da baki. Yana nufin ' gram dubu daya. an Samar da kilogram a ƙarshen karni na 18 ta wani ɗan ƙaramin silinda na platinum. An maye gurbinsa a cikin 1889 dilogiram, kuma silinda mai ƙarfi, mai tsayi daidai da diamita, wanda aka yi da alloy iri ɗaya na platinum-iridium a matsayin mashaya sannan ake amfani da shi azaman ma'aunin ayyana mita. Madaidaicin kilogiram an adana shi a dakin gwaje-gwaje na Ofishin Ma'auni da Ma'auni na Duniya a Sèvres, Faransa. a cikin 1989 an gano cewa samfurin da aka ajiye a Sèvres ya fi mikrogram 50 sauƙi fiye da sauran kwafin madaidaicin kilogiram. Don guje wa matsalar samun siffanta kilogram da wani abu mai yawan gaske, babban taron ma'auni da ma'auni (CGPM) ya amince a shekara ta 2011 ga wata shawara ta fara sake fasalta kilogram ba ta wani abu na zahiri ba amma ta ainihin nauyi na zahiri. Zaɓin akai-akai shine Planck's akai-akai, wanda za'a bayyana shi daidai da 6.62607015 × 10−34 joule. Joule ɗaya yana daidai da murabba'in sau kilo mita ɗaya a murabba'in daƙiƙa guda. Tun da na biyu da mita an riga an ayyana ta dangane da mitar layin cesium da saurin haske, bi da bi, sannan za'a tantance kilogram ta ingantattun ma'auni na dindindin na Planck. An karɓi shawarar a 2018 CGPM kuma, mai tasiri daga Mayu 20, 2019, za a ayyana kilogram ta dindindin na Planck. Duba kuma Tsarin Ƙungiyoyin Ƙasashen Duniya.

Kilogram
SI base unit (en) , unit of mass (en) da coherent SI unit (en)
Bayanai
Bangare na	MKS system of units (en) da International System of Units (en)
Gajeren suna	kg
Suna saboda	kilo (en) da gram (en)
Wanda yake bi	grave (en)
Auna yawan jiki	nauyi
Determination method (en)	formula (en)