The standard kilogram is a platinum-iridium cylinder 39.0 mm in height and 39.0 mm in diameter.What is the density of the material? A)21.5 g/cm³ B)19.3 g/cm³ C)13.6 g/cm³ D)10.7 g/cm³

Question

Quizplus · Accepted Answer

The volume of the cylinder is calculated using the formula V = πr²h. With a radius of 19.5 mm and height of 39.0 mm, the volume is approximately 46.8 cm³. The mass is 1000 g (1 kg), so the density is 1000 g / 46.8 cm³ ≈ 21.5 g/cm³.

The Standard Kilogram Is a Platinum-Iridium Cylinder 39