An ice hockey puck is in the shape of a cylinder with a radius of 38 mm, and a thickness of of 35mm. It has a density of 1.5 g/cm3. FInd the mass.
radius = 38 mm --> 3.8 cm thickness = 35 mm --> 3.5 cm volume = πr²h volume = π(3.8 cm)²(3.5 cm) volume = 50.54 cm³ density = 1.5 g/cm³
density = mass / volume 1.5 g/cm³ = mass / 50.54 cm³ [multiply 50.54 cm³ on both sides] 75.81 g = mass [cm³ cancels out]
