an object
Whether things float or sink this depend only on the density , the density of the salt water is aprox. 1030 kilogram per meter cube so if you but things have density less than that they will float , things with higher density sink.
Not necessarily. Density is mass divided by volume. Many different things could have the same density.
muscle density and bone density
population density
These are just the characteristics of that particular material. Such things as density, thermal expansion, velocity of sound, melting and freezing point and so on.
their density is less than that of water
Density is important because it can show you if things float or sink.
Anything/everything with any mass has density.
Whether small things float or not depends on their density. If the density of an object is less than the density of the fluid it is placed in (such as water), then it will float. However, if the density of the object is greater than the density of the fluid, it will sink.
Many things have density, including liquids, solids, and gases. For example, water has a density of 1 g/cm³, while materials like gold and lead have much higher densities. The density of an object is determined by its mass and volume.
The temperature and the salinity affect water's density.
Density is found by dividing the mass of an object by its volume.