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The Physics Source is a collection of resources for introductory college level physics courses. It includes curriculum, curriculum support material, reference material, and pedagogical and physics education research inspired content.

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July 9th History

1856: Amedeo Avogadro, Count of Quarenga, died in Turin, Italy. He stated his law relating the volume of gases and the number of particles contained within in 1811.
Source: Physics Infomall.