Understanding Density
Density is a fundamental physical property of matter. It is defined as mass per unit volume. In simpler terms, it tells us how much "stuff" is packed into a specific space. Objects with higher density feel heavier for their size compared to objects with lower density.
The Density Formula
The mathematical relationship between density, mass, and volume is expressed as:
ρ = m / V
Where:
- ρ (Rho) = Density
- m = Mass
- V = Volume
Standard Units
Depending on the context, density can be measured in various units:
- Metric: Grams per cubic centimeter ($g/cm^3$) or kilograms per cubic meter ($kg/m^3$).
- Imperial: Pounds per cubic foot ($lb/ft^3$).
- Liquids: Grams per milliliter ($g/mL$) is common, which is numerically equivalent to $g/cm^3$.
For example, pure water has a density of $1 g/cm^3$ at 4°C.