Density, floating, and sinking
The understanding that different materials have different densities, and of a relationship between density, floating, and sinking must date to … 展开

A number of techniques as well as standards exist for the measurement of density of materials. Such techniques include the use of a hydrometer (a buoyancy method for liquids), Hydrostatic balance (a buoyancy method for liquids and solids), immersed … 展开

• Densities of the elements (data page)
• List of elements by density
• Air density
• Area density
• Bulk density 展开

• "Density" . Encyclopædia Britannica. Vol. 8 (11th ed.). 1911.
• "Density" . The New Student's Reference Work . 1914.
• Video: Density Experiment with Oil and Alcohol
• Video: … 展开

From the equation for density (ρ = m/V), mass density has any unit that is mass divided by volume. As there are many units of mass and volume covering many different magnitudes there are a large number of units for mass density in use. The SI 展开

In general, density can be changed by changing either the pressure or the temperature. Increasing the pressure always increases the … 展开

The density of a solution is the sum of mass (massic) concentrations of the components of that solution.
Mass (massic) concentration of each given component $${\displaystyle \rho _{i}}$$ in a solution sums to density of the solution,
Expressed as a function … 展开