no
most of your body that isn't water is less dense than water, that's why humans usually float.
the same
yes. the density of a element will not change only the mass and volume will.
No. As long as they're at the same temperature.
Same density.
The densities are equivalent.
The water would have the same density anywhere it is.
No salt has a greater density.
Yes, skin can float on water due to its density being lower than that of water. This is why skin can sometimes form a thin layer on the surface of water, especially when oils or lotions are present on the skin.
The density of any substance remains the sameirrespective of its volume.
Oranges, like many fruits, have air pockets in their skin that help them float in water. These air pockets make the overall density of the orange, including the skin, less than the density of water, causing it to float.
nothing
yes, density stays the same regardless of amount