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A pound of feathers because feathers are less dense than lead and therefore take up more volume for the same mass.
Because sand is a more dense substance than feathers - it has a larger mass-to-volume ratio.
Bricks have more density whereas feathers have less comparatively. Space occupied ie volume = mass/ density. So space occupied is inversely related to the density. Hence feathers occupy more space than the bricks.
Sand. Density is mass / volume. So a higher volume will equal a lower density. Clearly a Kg of feathers will (normally) take up more volume than a Kg of sand therefore the feathers are less dense. You could think of it this way: density is measuring how close together the atoms in a substance are. When the atoms are closer together they take up less volume and the substance is more dense. If you put a Kg of feathers in a box, the feathers would not all join together perfectly meaning that there would be gaps between feathers and therefore the volume taken up by the feathers is greater. You could prove this by trying to push your hand through the feathers. You would be pushing through partly air (which is a mixture of gases and the atoms in a gas are further apart than in a solid) so the task would be easier. It is like comparing pushing your hand through a solid and pushing your hand through solids separated by gas. The latter is easier because there is some "room" for the atoms in the solid to move in to and thus for the feathers to move out of the way of your hand.
They weight exactly the same amount. Of course its going to take more feathers to make 100 lbs so the feathers are going to have a greater mass.
The feathers "take up more room" than the lead. It would be hard to compress the feathers to make them as dense as lead. The feathers have more volume.
A pound of feathers because feathers are less dense than lead and therefore take up more volume for the same mass.
A pound of feathers has more mass. The are lighter so they would take up more space to make a pound.
Lead is more dense and compact than feathers, so 1kg of lead would take up less space and would be easier to carry around in a smaller package. Feathers are lighter and bulkier, so they would occupy more space and be more awkward to carry.
A kilogram of lead weighs the same as a kilogram of feathers. The difference lies in the volume and density of the materials - lead being much denser than feathers, so it would take up much less space than the feathers.
Because sand is a more dense substance than feathers - it has a larger mass-to-volume ratio.
No, 1 kilogram of feathers would take up more volume than 1 kilogram of gold. This is because feathers have a much lower density than gold, meaning they are less compact and take up more space for the same mass.
An ounce of gold has more mass than an ounce of feathers. This is because gold is denser than feathers, meaning that a smaller volume of gold contains more mass compared to a larger volume of feathers.
You mixing apples and oranges. Pounds is a measure of weight. Quarts is a measure of volume. A 120 pounds of feathers will take up much more volume then 120 pounds of lead.
They both weigh the same, one pound. The difference lies in the volume or amount of feathers and concrete needed to reach that weight. Feathers are much less dense than concrete, so a pound of feathers will take up much more space than a pound of concrete.
There is no way to compare. It's like comparing apples to oranges. A pound of lead may only take up a few fluid ounces of volume, but a pound of feathers would take up hundreds of fluid ounces of volume. There is no direct correlation between units of weight and units of volume. The density of lead is 11.34 oz/fluid oz; so a pound of lead would take up only 1.411 fluid ounces of volume. By comparison, gold has a density of 19.3 oz/fluid oz; so a pound of gold would take up only 0.829 fluid oz. (This is using Avoirdupois ounces, not Troy ounces.)
Bricks have more density whereas feathers have less comparatively. Space occupied ie volume = mass/ density. So space occupied is inversely related to the density. Hence feathers occupy more space than the bricks.