(a(i))[1]
State the name of the measuring instrument shown in Fig. 2.1.
(a(ii))[2]
Determine the height difference $h$ between the mercury levels in Fig. 2.1.
(b)[1]
Determine the pressure in the gas supply.
(c)[1]
Suggest why this measuring device is filled with mercury rather than coloured water.
(d)[1]
On Fig. 2.2, draw and label the mercury levels on side A and on side B of the tube.