Density

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Density

• ? D m/V

Giancoli physics Read Fluids Ch10 pp 275
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Density

• Density ? (lower case Greek letter rho)
• is defined as mass per unit of volume.
• m mass
• V Volume
• SI unit kg/m3
• Other units are g/ml, g/cm3

? m/V
Water ? 1 gram/cm3 1000 kg/m3 at 4C
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Ice floats-less dense than water! Photo HOTRAX
2005 Arctic Ocean
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Density of Water at 4C
? 1 g/cm3 1000kg/m3 at 4C

• At Standard Atmospheric Pressure (760mm of
  mercury) water has a freezing point of 0C (32F)
  and a boiling point of 100C (212F). 
• Water is at its maximum density at 4C (39F).

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States of matterGas, liquid, solid

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Plasma 4th state of matter

• Plasmas consist of freely moving charged
  particles, i.e., electrons and ions. Formed at
  high temperatures when electrons are stripped
  from neutral atoms, plasmas are common in nature.

Lightning Sun core Neon lights