In aircraft design, the mass of a substance is typically measured in kilograms (kg), which is the SI (International System of Units) unit for mass.
The mass of a substance can be calculated using the formula:
- Mass is the amount of the substance in kilograms (kg).
- Volume is the space occupied by the substance in cubic meters (m^3).
- Density is the density of the substance in kilograms per cubic meter (kg/m^3).