Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Density and Pressure
72 practice questions
Topics covered
Practice questions
31–34 of 34 · Easy
Question 31
2 marks · Easy
Answer and see the solution →A container is filled with glycerol to a height of 2.0 m. The density of glycerol is 1260 kg/m³. Take g = 10 N/kg. What is the pressure difference between the top and the bottom of the glycerol?
Question 32
3 marks · Easy
Answer and see the solution →A column of treacle is 0.80 m high in a tube. The density of treacle is 1420 kg/m³, and g = 10 N/kg.
(a)[1 mark]Write the equation for the pressure difference across the treacle.
(b)[2 marks]Calculate the pressure difference between the top and bottom of the column.
Question 33
4 marks · Easy
Answer and see the solution →A container is filled with oil up to a height of 0.25 m. The density of oil is 900 kg/m³.
(a)[2 marks]Calculate the pressure due to the oil at the bottom of the container (use g = 10 N/kg).
(b)[1 mark]State one difference (with reason) between the pressure just below the surface and at the bottom of the oil.
(c)[1 mark]Explain why the pressure caused by the liquid is the same in all directions at the same depth.
Question 34
4 marks · Easy
Answer and see the solution →A student wants to find the density of a small stone. She measures the mass of the stone as 45 g, and the volume of water displaced by the stone is 16 cm³.
(a)[1 mark]State the equation used to calculate density.
(b)[1 mark]Calculate the density of the stone in g/cm³.
(c)[1 mark]Explain why the student used water displacement to measure the volume.
(d)[1 mark]If the stone is placed at the bottom of a container and rests on an area of 3.0 cm², calculate the pressure it exerts on the bottom (in Pa). (Take g = 10 N/kg.)