(a)[2]
Explain, in molecular terms, why liquids are extremely difficult to compress.
(b(i))[3]
Calculate the pressure of the oil at the bottom surface of the piston.
(b(ii))[2]
As the boxes are lifted, the oil becomes deeper. Explain why the pump must apply an increasing pressure to the oil as the depth of the oil increases.
(b(iii))[1]
Suggest one reason why a force of 8800 N in (b) is unable to lift boxes of weight 8800 N.