A kilogram is a unit of mass defined by the International System of Units (SI) as the mass of a specific platinum-iridium alloy cylinder called the International Prototype of the Kilogram (IPK). Any object with the same mass as the IPK, which is precisely equal to one kilogram, would have the same mass as a kilogram. This definition ensures consistency and accuracy in measurements of mass worldwide.
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They both have the same mass. A kilogram measure mass regardless of the material, volume etc.
Half a kilogram is the mass in this case.Half a kilogram is the mass in this case.Half a kilogram is the mass in this case.Half a kilogram is the mass in this case.
Neither! They both have the same mass of 1 Kilogram.
The same unit as you use to measure any mass. The SI unit for mass is the kilogram.
the gold would have more mass unless there is no gravity like on the moon then they would both fall at the same time.