The standard kilogram is a platinum-iridium cylinder 30.0 mm in height and 31.0 mm in diameter.What is the density of the material?

Question

Quizplus · Accepted Answer

The density of the material can be calculated using the formula:density = mass/volumeThe mass of the cylinder is 1 kg, and the volume can be calculated using the formula for the volume of a cylinder:volume = πr^2hwhere r is the radius of the cylinder and h is the height.The radius of the cylinder is 15.5 mm, and the height is 30.0 mm.Substituting these values into the formula for the volume, we get:volume = π(15.5 mm)^2(30.0 mm) = 22.0 cm^3Substituting the mass and volume into the formula for the density, we get:density = 1 kg / 22.0 cm^3 = 45.5 g/cm^3The closest answer choice is A) 44.2 g/cm^3.

The Standard Kilogram Is a Platinum-Iridium Cylinder 30