Definition of Density Density?.

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Presentation transcript:

Definition of Density Density?

Covered in This Lesson This lesson will define density as mass/volume and provide relevant real world examples of objects with varying densities The density (D) of a pure substance is uniform throughout the sample, giving the same ratio of mass (m) to volume (V). The formula is D = m/V

Real World Examples Helium balloons; because helium gas has a density 0.179g/L while air has a density of about 1.25g/Lm helium balloons float.

Another Example Ice floats on water because water has a density of about 1 g/mL and ice has a density of about 0.9 g/mL.

A Third Example A kiwi can have a density of more than of water. An apple can have a density of less than water. That is why we bob for apples