Fig. 3.1 illustrates an oil tank with a rectangular base measuring 2.4 m by 1.5 m. The tank contains oil with density $850\,\text{kg m}^{-3}$ to a depth of 1.5 m.
(a(i))[2]
Calculate the pressure exerted by the oil on the tank base.
(a(ii))[2]
Calculate the force exerted by the oil on the tank base.
(b)[1]
Calculate the mass of oil in the tank.
(c(i))[1]
State what this shows about the density of brass.
(c(ii))[1]
Explain how attaching the key to a piece of wood could stop the key from sinking.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Apply P = hρg, or an equivalent method” …