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Density. What is It?. Derived unit which shows the mass per unit of volume Density = Mass/ Volume More dense materials are “heavier” than less dense materials Compares mass without variable of size. Units of Density. For liquid or gas - g/ml For solid – g/cm 3.
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What is It? • Derived unit which shows the mass per unit of volume • Density = Mass/ Volume • More dense materials are “heavier” than less dense materials • Compares mass without variable of size
Units of Density • For liquid or gas - g/ml • For solid – g/cm3
Every Material Has A Unique Density • Lead 11.35 g/cm3 • Granite 2.70 g/cm3 • Water 1.00 g/ml • Ice .91 g/cm3 • Cork .24 g/cm3
Sink or Float • Substances less dense than water float • More dense than water they sink
Example 1 • What is the density of alum with a volume of 4.00 cm3 and a mass of 10.8 g?
Example 2 • A piece of quartz has a volume of 30 cm3. The density is 2.65 g/ cm3, what is the mass?
Example 3 • Bone has a density of 1.85 g/ cm3, what is the volume of a 55g bone?