(a)[1]
Define the term density.
(b)
Fig. 1.1 depicts a cuboidal glass block. A student records the block's mass $m$ and the side lengths $x$, $y$ and $z$. The measurements are listed in Table 1.1.
(b(i))[2]
Determine the density of the glass block.
(b(ii))[3]
Calculate the percentage uncertainty for the density.
(c)[1]
The true density of the glass is not the same as the answer in (b)(i) because a systematic error affected the measurements. Suggest one likely cause of this systematic error.