An old iron cylinder retrieved from a physics laboratory cupboard is stamped with 200 g. A student places this cylinder on a digital top-pan balance, which displays a reading of 196.4 g.
The student states: "The digital balance must be faulty so it is not reading correctly." Evaluate this conclusion.
The student wants to determine the density of this iron cylinder. They already have an accurate value for its mass. Describe the remaining experimental procedure, precautions, and calculations they must perform to find the density.