(a)[1]
Define density
(b)
The mass $m$ of a metal sphere is given by $m = \frac{\pi d^3 \rho}{6}$, where $\rho$ is the density of the metal and $d$ is the diameter of the sphere. The density and mass data are shown in Fig. 1.1.
(b(i))[1]
Calculate the diameter $d$
(b(ii))[3]
Use your answer to (i) and the information in Fig. 1.1 to determine $d$, including its absolute uncertainty, to a suitable number of significant figures.