Density is mass per unit volume. It determines whether objects float or sink, and is fundamental in materials selection.
Understanding Density
Density (ρ) = Mass ÷ Volume. Water at 4°C: 1,000 kg/m³ = 1 g/cm³ = 62.43 lb/ft³.
Key Conversions
- 1 g/cm³ = 1,000 kg/m³ = 62.43 lb/ft³
- 1 lb/ft³ = 16.018 kg/m³
Common Material Densities
Air: ~1.2 kg/m³. Oak wood: 600–900 kg/m³. Aluminum: 2,700 kg/m³. Steel: 7,850 kg/m³. Gold: 19,300 kg/m³.
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Frequently Asked Questions
How do I convert g/cm³ to kg/m³?
Multiply by 1,000. Gold: 19.3 g/cm³ = 19,300 kg/m³.