Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
Pressure in liquids and gases
16 practice questions
Practice questions
1–8 of 8 · Normal
Question 1
4 marks · Normal
Answer and see the solution →A diver is swimming 15 m below the surface of a lake. The density of water is and gravitational field strength is .
(a)[2 marks]Calculate the pressure due to the water at this depth.
(b)[2 marks]Explain why the pressure is the same in all directions at this depth.
Question 2
2 marks · Normal
Answer and see the solution →Explain why the pressure on your body from the atmosphere does not crush you.
Question 3
2 marks · Normal
Answer and see the solution →A steel block has a mass of 24 kg and is in contact with the ground over an area of 0.06 m². Calculate the pressure it exerts on the ground. (Take ).
Question 4
1 mark · Normal
Answer and check →Which change will increase the pressure beneath a liquid surface the most?
- A.Increasing the depth of the liquid
- B.Decreasing the density of the liquid
- C.Reducing gravitational field strength
- D.Reducing the area under consideration
Question 5
3 marks · Normal
Answer and see the solution →Describe how you could demonstrate that gases exert pressure using simple apparatus in the laboratory.
Question 6
4 marks · Normal
Answer and see the solution →The pressure due to the atmosphere is about 100,000 Pa. A rectangular hatch on a submarine has an area of 0.24 m².
(a)[2 marks]Calculate the total force exerted by the atmosphere on the hatch.
(b)[2 marks]The submarine dives so there is sea water on the other side. State one factor that will increase the force on the hatch.
Question 7
2 marks · Normal
Answer and see the solution →Some machines, such as bulldozers, use wide caterpillar tracks instead of wheels. Explain why this design helps the machines move on soft ground.
Question 8
2 marks · Normal
Answer and see the solution →Calculate the pressure at a depth of 6 m under oil of density 800 kg/m³. Take .