Density e mass per unit volume, calculated as ρ = m/V. It measures how much matter e packed into un given space. Water ha un density di 1 g/cm³ o 1000 kg/m³. Materials denser than their surrounding fluid sink; less dense materials float.

Comprendere Density

Mass, Volume, e Buoyancy

Impara Informazioni Density

Density explains perche un steel ship floats while un steel ball sinks, perche hot air rises, e perche oil floats on water. This fundamental property connects mass e volume, determining how materials behave in il physical world.

Comuni Material Densities

Material	Density (g/cm³)	Density (kg/m³)
Air (sea level)	0.0012	1.2
Cork	0.24	240
Wood (oak)	0.6-0.9	600-900
Ice	0.92	920
Water	1.00	1000
Aluminum	2.7	2700
Iron	7.87	7870
Gold	19.3	19300

Perche Things Float o Sink

Archimedes' Principle

An object floats if its density e less than il fluid it's in:

Wood (0.7 g/cm³) floats in water (1.0 g/cm³)
Ice (0.92 g/cm³) floats in water
Oil (0.8-0.9 g/cm³) floats on water
Lead (11.3 g/cm³) sinks in water

Ships Float Because

Steel ships float because they enclose air, making their overall density less than water.

Converti Density Unita

Factors Affecting Density

Temperature: Most materials expand quando heated, reducing density
Pressure: Gases compress significantly; solids e liquids much less
Composition: Alloys e mixtures hanno densities tra their components

Conclusione

Density—mass per unit volume—e fundamental un comprendere buoyancy, material properties, e physical behavior. Objects denser than their surrounding fluid sink; less dense objects float. This simple relationship explains phenomena da icebergs un hot air balloons.