Music World’s Roundest Object! by DDF - March 25, 2013 0 Source Tags: avogadro, avogadro project, bipm, csiro, definition, definition of the kilogram, gram, grave, history of the kilogram, kilo, kilogram, kilogram definition, kilogram of the archives, kilogramme, kilograms, mass, metric system, Perfect, perfect sphere, physics, quantity, redefining the kilogram, roundest object, science, si units, silicon, silicon sphere, silicon-28, sphere, unit, units, veritasium, watt balance, weight, weights, world's roundest object
