Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Solids, Liquids and Gases
279 practice questions
Topics covered
Practice questions
41–50 of 144 · Normal
Question 41
3 marks · Normal
Answer and see the solution →A student investigates the density of three liquids by measuring their mass and volume. Her results are shown below.
Student data for three liquids Liquid Mass (g) Volume (cm³) Density (g/cm³) A 50 40 B 60 50 C 30 25 Complete the table by calculating the density of each liquid. Show your working.
Question 42
2 marks · Normal
Answer and see the solution →Explain why a solid iron nail sinks in water but a solid block of wood floats.
Question 43
3 marks · Normal
Answer and see the solution →A school laboratory has a large block of wax. A student is asked to determine the density of the wax.
(a)[1 mark]She records the mass as 1.20 kg. She measures the block’s dimensions as 20.0 cm × 10.0 cm × 5.00 cm. Calculate the volume in m³.
(b)[2 marks]Calculate the density of the wax block in kg/m³.
Question 44
3 marks · Normal
Answer and see the solution →Describe how you would use a measuring cylinder to measure the volume of an irregular solid. Why is it important to ensure no air bubbles are trapped underneath the object?
Question 45
1 mark · Normal
Answer and see the solution →State the equation linking pressure, force and area for a solid surface. Use standard symbols.
Question 46
2 marks · Normal
Answer and see the solution →A student pushes a box with a force of 180 N onto the floor. The area of contact between the box and the floor is 0.6 m². Calculate the pressure exerted by the box on the floor.
Question 47
3 marks · Normal
Answer and see the solution →A metal plate rests on soft ground. The plate has a weight of 600 N and covers an area of 0.75 m².
(a)[2 marks]Calculate the pressure the plate exerts on the ground. Give your answer in Pa.
(b)[1 mark]Explain how the pressure would change if the area of the plate were halved, but the weight stayed the same.
Question 48
2 marks · Normal
Answer and see the solution →Explain, using the pressure equation, why a sharp knife is easier to use for cutting than a blunt knife.
Question 49
3 marks · Normal
Answer and see the solution →Describe a practical method for measuring the pressure that a student's shoe exerts on the ground.
Question 50
1 mark · Normal
Answer and see the solution →Which of these will result in the greatest pressure exerted on the ground?
Force (N) Area (m²) 400 0.5 250 0.2 800 2.0 120 0.1 - A.400 N, 0.5 m²
- B.250 N, 0.2 m²
- C.800 N, 2.0 m²
- D.120 N, 0.1 m²