An engineer measures the pressure in a large storage tank filled with oil at two different depths. The measurements are performed on two different days: once when the oil temperature is 10 ∘C10\ ^\circ\text{C}10 ∘C, and once when it is 40 ∘C40\ ^\circ\text{C}40 ∘C.
The density of the oil decreases as its temperature increases.
Which combination of depth and temperature produces the least oil pressure?
5 m5\text{ m}5 m depth and 10 ∘C10\ ^\circ\text{C}10 ∘C temperature
5 m5\text{ m}5 m depth and 40 ∘C40\ ^\circ\text{C}40 ∘C temperature
15 m15\text{ m}15 m depth and 10 ∘C10\ ^\circ\text{C}10 ∘C temperature
15 m15\text{ m}15 m depth and 40 ∘C40\ ^\circ\text{C}40 ∘C temperature
188 exam-style questions on CIE IGCSE Physics Pressure, covering Pressure. Each one has a worked solution and a mark scheme showing where the marks go.