@rudymegens @stux Indeed. The #kilogram of #feathers has a lower density, so a larger volume. Therefore its center of mass will be slightly higher than that of the #lead and farther from the ground. That makes it slightly lighter.
#kilogram #feathers #lead
In the balance: scientists vote on first change to #kilogram in a century | #Science | The Guardian
https://www.theguardian.com/science/2018/nov/09/in-the-balance-scientists-vote-on-first-change-to-kilogram-in-century
#Metrology #Mass #SIUnits
#kilogram #science #metrology #mass #siunits