Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
Pressure and depth
15 practice questions
Practice questions
1–10 of 15
Question 1
1 mark · Easy
Answer and see the solution →State the equation that relates the pressure difference in a liquid to its density, the height of the column, and gravitational field strength.
Question 2
2 marks · Easy
Answer and see the solution →Calculate the pressure difference at a depth of 2.5 m in a liquid of density 1200 kg/m³. Take g = 10 N/kg.
Question 3
2 marks · Easy
Answer and see the solution →Explain why the pressure in a liquid increases with depth.
Question 4
2 marks · Easy
Answer and see the solution →A liquid has a density of 1100 kg/m³. The pressure difference between two points is measured as 22,000 Pa. Gravitational field strength is 10 N/kg. Calculate the difference in depth between the two points.
Question 5
3 marks · Easy
Answer and see the solution →A rectangular tank is filled with a liquid to a depth of 1.2 m. The density of the liquid is 950 kg/m³. g = 10 N/kg.
(a)[2 marks]Calculate the pressure at the bottom of the tank due to the liquid.
(b)[1 mark]State one way to increase the pressure at the bottom of the tank.
Question 6
2 marks · Easy
Answer and see the solution →A weather map uses isobars to show regions of equal atmospheric pressure. Explain why areas where isobars are close together often experience strong winds.
Question 7
3 marks · Easy
Answer and see the solution →Figure 1 shows a simple barometer using oil instead of mercury. The oil has a density of 900 kg/m³. The height of the oil column is 1.4 m. Take g = 10 N/kg.
Figure 1: Simple oil barometer (a)[2 marks]Calculate the atmospheric pressure in Pascals.
(b)[1 mark]Suggest why mercury is usually used in barometers rather than oil.
Question 8
4 marks · Normal
Answer and see the solution →A diver is swimming in a freshwater lake. The density of freshwater is . The gravitational field strength is .
(a)[3 marks]Calculate the pressure difference between the surface and a point 3.5 m below the surface.
(b)[1 mark]State two factors that would cause the pressure at the same depth in another liquid to be greater.
Question 9
2 marks · Normal
Answer and see the solution →Explain, using ideas about forces, why the pressure at the bottom of a swimming pool is greater than the pressure at the surface.
Question 10
4 marks · Normal
Answer and see the solution →A scientist designs a rectangular tank filled with oil. The base measures 0.80 m by 1.20 m. The oil has a density of 900 kg/m³. The height of the oil column is 2.0 m and g = 10 N/kg.
(a)[2 marks]Calculate the pressure difference between the top and bottom of the oil in the tank.
(b)[2 marks]Calculate the force exerted by the oil on the base of the tank.