Labarai
-
A baya da na yanzu na kilogram
Nawa ne nauyin kilogram? Masana kimiyya sun binciko wannan matsala mai sauƙi na ɗaruruwan shekaru. A cikin 1795, Faransa ta ƙaddamar da wata doka da ta ayyana "gram" a matsayin "cikakkiyar nauyin ruwa a cikin kubu wanda girmansa yayi daidai da ɗari na mita a zafin jiki lokacin da ic ...Kara karantawa