It depends on the unit used. If both are in kilograms, Rodney has more mass. If Bill's weight is in kilograms while Rodney's weight is in grams, Bill has more mass. Also, the place which they measure the weight also affects the result. If Bill measures on Earth, while Rodney measures in the moon, even if the units are the same, Bill has more mass
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On earth, a mass of 5.306 kilograms weighs 52 newtons. That's some baseball ! More like a bowling ball.
Nothing would, because "kilogram" is a unit of mass, not weight (force). One kilogram of mass weighs 9.8 newtons (2.205 pounds) on Earth, but it weighs something different in other places. One kilogram is roughly the mass of 34 fluid ounces of water, and it's 10% more than the mass of a 2-pound block of cheese.
One 'metric ton'. On earth, that much mass weighs roughly 2204.62 pounds (rounded), or 10.23% more than a 'customary' ton.
A kilogram of silver weighs more.
Kilogram is a unit of mass, not of weight. In SI units, weight is measured in Newtons. See here for more details: http://en.wikipedia.org/wiki/Mass_versus_weight65 kilograms is approximately the mass of a typical adult person.