2.8.3

Density

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Density

Density is defined as a substances mass per unit volume. It varies between different substances.

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Calculating density

  • It is calculated by Density = Mass ÷ Volume
  • It is measured in g/cm3 or kg/m3
  • The symbol that represents density is ρ (the Greek rho).
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Water and density

  • Water has a density of 1g/cm3.
    • If a substance has a density lower than this it will float.
    • If it has a density higher than this it will sink.
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Changing density

  • You can increase the density of a fixed volume of a gas if you add more particles into the fixed volume.
  • If you have a fixed mass you can increase the decrease the density if you reduce the volume of the substance.

Jump to other topics

1Biology

1.1Cells, Tissues & Organs

1.2Reproduction & Variation

1.3Ecological Relationships & Classification

1.4Digestion & Nutrition

1.5Plants & Photosynthesis

1.6Biological Systems & Processes

2Chemistry

2.1Particles

2.2Chemical Reactions

2.3Atoms, Elements, Compounds

2.4The Periodic Table

2.5Materials & the Earth

2.6Reactivity

2.7Energetics

2.8Properties of Materials

3Physics

3.1Energy

3.2Forces & Motion

3.3Waves

3.4Electricity & Magnetism

3.5Matter

3.6Space Physics

4Thinking Scientifically

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