Both are equal
Depends if they weigh 1 kilogram where they are or one kilogram compared to Earth's gravitational pull.
~The kilogram technically does not measure weight, it measures mass. If all the items you mention have the same mass then the densest material (iron) has the greatest weight because it displaces the least volume of air. A balloon filled with one kilogram (around 5600 liters) of helium will float in the air. If you want to measure weight, the proper unit is the Newton.
Iron has a greater density.
These two quantities both weigh the same- 10 pounds.
Feathers
gold it is thre times heavier!
Neither, a pound of money please.
Due to atmospheric pressure the weight of 10 kg of cotton is grater than 10 kg of iron.
Iron has a greater density.
They are both equal in weight.
They both weigh 1kg....... so they weigh the same,
Not sure if this is a serious question but...A kilogram is a unit of mass, or in this case, weight.A kilogram is a kilogram.One kilogram of anything is a kilogram.1 kg of iron = 1 kg of wool.
No a lb of bricks and a pound of feathers is still a pound same with concrete and iron
I don't know what "appears heavier" means. A kilogram of mass is a kilogram of mass. Appearance has nothing to do with it. The cotton is (probably) less dense than the iron and will occupy a larger volume, but that doesn't have anything to do with the vacuum part.
They are equal weight.
These two quantities both weigh the same- 10 pounds.
Iron fillings are heavier.
Iron is heavier because iron is a metal and metals are heavier but silica is not a metal so silica is lighter than iron.
No, atomically Iron is a heavier element