(a(i))[1]
State the SI base unit for volume.
(a(ii))[1]
Show that the SI base units of pressure are $\text{kg m}^{-1}\text{s}^{-2}$.
(b)[3]
The liquid volume $V$ passing through a pipe in time $t$ is described by the equation $\frac{V}{t} = \frac{\pi P r^4}{8 C l}$, where $P$ is the pressure difference across the ends of the pipe with radius $r$ and length $l$. The constant $C$ is determined by the liquid's frictional effects. Find the base units of $C$.