erm, 49 kg?
They both weight a kilogram. Lead has a higher density.
air has no weight
There is none. Consider a kilogram of air and a kilogram of lead. The two will have considerably different volumes.
49 kilogram = 108.026 508 47 pound49 kilogram = 0.964 522 397 06 hundredweight [long, UK]49 kilogram = 1.080 265 084 7 hundredweight [short, US]49 kilogram = 108.026 508 47 lb, lbs49 kilogram = 0.048 226 119 853 ton [long, UK]49 kilogram = 0.048 226 119 853 ton [long, UK]49 kilogram = 0.049 ton [metric]49 kilogram = 0.049 tonne49 kilogram = 1 728.424 135 5 ounce
They both weigh one kg, so they should have the same weight.
They both weigh the same: 1kg = 1kg. The kg of butter has a greater volume and the kg of lead has a higher density.
Please note that a kilogram is a unit of mass - NOT a unit of weight. And yes, a pencil has a mass that is considerably less than a kilogram. For comparison, a kilogram is the mass of a liter of water.
The density of a material is defined as its mass per unit volume. A given volume of lead has more mass than a given volume of feathers. In common usage mass often refers to weight, but that is not a very exact usage of it. For this question it may be useful however to think of a given weight of lead per volume and a given weight of feathers.If you have a kg of lead, that is a small piece, a kg of feathers is a large amount.So for a given volume, say a cubic centimeter, the weight of lead is much more than the weight of feathers.
A kilogram is a measure of mass therefore a kilogram of lead and a kilogram of feathers have the same mass: one kilogram. They would, however, have different volumes and densities.
A kilogram of butter as it is less dense than lead.
No. Kilogram is a unit of mass, not of weight.
No, both weigh a kilogram