Bird bones because feathers are very light and the bones just depend on the type of bird.
Bird's feathers weigh more than their bones, according to Duncraft.
One kilogram of brick weighs as much as one kilogram of feathers. (I do not know what a "chesse of feathers" is...)
Concrete
1 lb of sugar weighs exactly the same as 1lb of feathers. a pound is a pound is a pound.
An ounce of Gold Weighs more. An ounce of gold weighs 2.7539537 grams more, than an ounce of feathers. Gold is weighed in Troy ounces and feathers are weighed in standard ounces. There are 31.1034768 grams in 1 Troy ounce and there are 28.3495231 grams in 1 standard ounce.
They weigh the same.
A truck full of feathers.
a brick
I would need more details to answer but if your asking about the common question, "What weighs more, an ounce of feathers, or an ounce of rocks?" then they are the same.
they are equal dummy
Each weighs a pound so neither weights more than the other..
hollow bonesfeathersmuscular chests
Pebbles are heavier because they're rocks. Feathers are lightweight and fur.