Density (6:26)
In this video, the Flipping Physics team discusses the concept of mass and density by comparing the mass and density of steel and wood. The team first addresses the misconception that steel is always more massive than wood, explaining that the mass of an object cannot be determined without knowing its size. They then discuss the definition of density and how it is a material property of any pure substance, explaining the formula for calculating density and how it changes with temperature and pressure. The team calculates the densities of two equal diameter spheres made of steel and wood and compares them to the accepted values for the densities of these materials. Finally, they answer the original question of which material has more mass, concluding that steel has a larger mass per unit volume than wood. Overall, this video provides a comprehensive explanation of the concepts of mass and density using realworld examples.
Chapters: 0:00 Which has more mass, steel or wood? 1:23 Density 2:25 Calculating Density 4:26 Observed vs. Accepted Densities 5:51 Which has more mass, steel or wood? 

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 Thank you to Carl Hansen, Julie Langenbrunner, and Scott Carter for being my Quality Control Team for this video.