Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
Pressure and Depth
16 practice questions
Practice questions
1–8 of 8 · Normal
Question 1
3 marks · Normal
Answer and see the solution →A diver is swimming at a depth of m below the surface of freshwater. The density of freshwater is . The gravitational field strength is .
(a)[2 marks]Calculate the pressure difference between the diver and the water surface.
(b)[1 mark]State the relationship used to calculate the pressure difference in this situation.
Question 2
3 marks · Normal
Answer and see the solution →A tank is filled with oil to a depth of m. The density of the oil is . Take gravitational field strength as .
Calculate the pressure difference between the top and the bottom of the tank.
Question 3
2 marks · Normal
Answer and see the solution →Explain why the pressure at the bottom of a swimming pool is greater than at the surface. Refer to molecules and the pressure-depth relationship.
Question 4
1 mark · Normal
Answer and check →Which change would double the pressure difference between two points in a liquid?
- A.Double the depth between the points.
- B.Halve the density of the liquid.
- C.Double the area at the bottom.
- D.Halve the gravitational field strength.
Question 5
2 marks · Normal
Answer and see the solution →A student measures the depth and pressure difference in a tank of an unknown liquid. The table shows her results. Calculate the density of the liquid.
Depth (m) Pressure Difference (Pa) 0.50 4900 1.00 9800 1.50 14700 Take .
Question 6
3 marks · Normal
Answer and see the solution →Describe an experiment to show that the pressure in a liquid increases with depth. Your answer should include the apparatus needed and how you would take measurements to show the pattern.
Question 7
2 marks · Normal
Answer and see the solution →A mercury column in a barometer stands at 0.60 m high. The density of mercury is 13,600 kg/m³. Use g = 10 N/kg.
Calculate the atmospheric pressure in Pascals.
Question 8
4 marks · Normal
Answer and see the solution →A reservoir contains a liquid with density . The reservoir is 15 m deep. Take .
(a)[2 marks]Calculate the pressure difference between the surface and the bottom of the reservoir.
(b)[2 marks]If a pipe runs from the bottom of the reservoir up to a point 7.5 m above the surface, what is the pressure difference between the bottom of the reservoir and the outlet of the pipe? Explain your reasoning.