- Density is the measure of how close and how heavy are the particles of matter in an object. It is measured in kg/m3 or g/cm3 or g/mL.
|Density (ρ) = ||Mass|
- Example of Density Rule
Q. A stone has a mass of 10 grams. When it is immersed in a measuring cylinder of water, the water level rises 5 millilitres. What is the density of the stone?
|A.||Density = ||Mass|| = ||10 grams|| = 2 g/mL|
- Densities of Some Common Substances
- Floating and Sinking
The density of water is 1 g/mL. Any substance (such as ice, petrol or oil) whose density is less than 1 will float. Any substance (such as lead) whose density is more than 1 will sink.