(a)[1]
She puts an empty test-tube on a top-pan balance, as shown in Fig. 2.1. Note the mass $m$ of the test-tube to three significant figures.
(b(i))[1]
Write down the new water level $V_2$ in the measuring cylinder.
(b(ii))[1]
Calculate how much the volume reading $V$ in the measuring cylinder increases.
(b(iii))[1]
Suggest one source of experimental inaccuracy when reading the scale on the measuring cylinder.
(c)[2]
Theory shows that the density $\rho$ of water is found from $\rho = \frac{m}{V}$. Use your answers to (a) and (b)(ii) to calculate $\rho$. Give the unit of your answer.