Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Solids, Liquids and Gases
279 practice questions
Topics covered
Practice questions
61–70 of 279
Question 61
4 marks · Normal
Answer and see the solution →The table gives data about liquid Y at different depths.
Depth / m Pressure difference / Pa 1.0 8500 2.0 17000 3.0 25500 (a)[3 marks]Calculate the density of liquid Y. Take g = 8.5 N/kg.
(b)[1 mark]Describe the relationship between depth and pressure difference in liquid Y.
Question 62
3 marks · Normal
Answer and see the solution →Describe an experiment you could carry out to show that the pressure in a liquid increases with depth. You may draw a diagram if it helps your description.
Question 63
2 marks · Normal
Answer and see the solution →Describe why the air pressure is less at the top of a mountain than at sea level.
Question 64
4 marks · Easy
Answer and see the solution →A solid metal block is dropped into a tank of water so that it sinks to the bottom. The block has a mass of 0.60 kg and a volume of 0.0002 m³.
(a)[2 marks]Calculate the density of the metal block in kg/m³.
(b)[1 mark]Use the equation for pressure in liquids to write down the formula linking pressure difference, height, density, and gravitational field strength.
(c)[1 mark]Explain why the metal block sinks in water, using your answers.
Question 65
4 marks · Easy
Answer and see the solution →A diver descends in the sea to a depth of 15 m. The density of seawater is 1025 kg/m³. Take gravitational field strength g = 10 N/kg.
(a)[2 marks]Calculate the increase in pressure on the diver at this depth, relative to the surface.
(b)[1 mark]Describe how pressure in a liquid acts on the diver at this depth.
(c)[1 mark]Explain how the force on a part of the diver’s body can be calculated using pressure and area.
Question 66
5 marks · Normal
Answer and see the solution →A rectangular wooden block has a mass of 0.96 kg. It has dimensions 0.20 m (length), 0.10 m (width), and 0.08 m (height). The block rests flat on the ground.
(a)[2 marks]Calculate the density of the wooden block in kg/m³.
(b)[2 marks]Calculate the pressure the block exerts on the ground, assuming the whole lower face touches the ground. Give your answer in pascals (Pa).
(c)[1 mark]State the equation linking pressure, force and area.
Question 67
4 marks · Normal
Answer and see the solution →A metal can has holes at different heights, and water squirts out horizontally from each hole when filled. The can stands in a tray. Assume g = 10 N/kg.
(a)[2 marks]Explain why the water squirts further from the lower holes than from the upper holes.
(b)[2 marks]The bottom hole is 0.20 m below the water surface. If the density of water is 1,000 kg/m³, calculate the pressure difference between the surface and the bottom hole.
Question 68
4 marks · Normal
Answer and see the solution →The atmosphere exerts a pressure of about 100,000 Pa at Earth's surface. A glass window has an area of 0.50 m².
(a)[2 marks]Calculate the force exerted on the outside of the window by the atmosphere.
(b)[2 marks]Describe why you do not notice this large force acting on the window in daily life.
Question 69
5 marks · Normal
Answer and see the solution →A cylindrical tube has an internal cross-sectional area of 0.003 m². The tube is filled with oil to a height of 1.2 m. The density of oil is 850 kg/m³. Take g = 10 N/kg.
(a)[2 marks]Calculate the pressure difference between the top and bottom of the oil column.
(b)[2 marks]Calculate the total force that the oil exerts on the base of the tube due to its pressure.
(c)[1 mark]State how the pressure at the bottom changes if the height of the oil is doubled. Explain your answer.
Question 70
1 mark · Easy
Answer and see the solution →State the SI unit for mass.