The liquid have density.
Because of density difference. High density causes the body to sink and low density makes the things to float on the surface.
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.
muscle density and bone density
Not necessarily. Density is mass divided by volume. Many different things could have the same density.
Density=Mass/Volume
population density
Anything/everything with any mass has density.
Density is important because it can show you if things float or sink.
If density is greater than 1.0 then it will sink in water.
their density is less than that of water
Density is important because it can show you if things float or sink.