Take $t_1$ from the stopwatch shown in Fig. 3.2.
Take $t_2$ from Fig. 3.3 and determine the mean time $t_{av}$ for $t_1$ and $t_2$. State your answer to the nearest $0.1\,\text{s}$.
The mean flow rate $R$ is defined by $R = \frac{30\,\text{cm}^3}{t_{av}}$. Calculate $R$ and include the unit in your response.
Complete Table 3.1 by filling in the headings with units, entering your results from (a)(i) and (a)(ii), and finding the average time for each pair of readings.
On the grid in Fig. 3.4, draw a graph of $t_{av}$ against $V$ with $t_{av}$ on the y-axis and $V$ on the x-axis. There is no need to start the axes at $(0,0)$. Add the curve of best fit.
Suggest why the times $t_1$ and $t_2$ for values of $V$ below $50\,\text{cm}^3$ are not taken.
On your graph, sketch the line you would expect if the small hole in the can were made slightly larger. Label this line L.