Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Solids, Liquids and Gases
279 practice questions
Topics covered
Practice questions
81–90 of 279
Question 81
1 mark · Normal
Answer and check →Which of the following is the correct SI unit for density?
- A.kg/m³
- B.g/cm³
- C.kg/cm³
- D.m³/kg
Question 82
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 83
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 84
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 85
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 86
4 marks · Hard
Answer and see the solution →Explain, using ideas about mass and volume, why the density of liquids generally changes less with temperature than the density of gases.
(a)[4 marks]Question 87
5 marks · Hard
Answer and see the solution →A student wants to determine the density of a cube of wood in the laboratory. She has a ruler, an electronic balance, and a container of water.
(a)[2 marks]Describe how she should measure the mass and the volume of the wood.
(b)[2 marks]Explain why the student should record each measurement three times and calculate an average.
(c)[1 mark]If the mass of the cube is 72.8 g and the length of one edge is 4.0 cm, calculate the density in kg/m³.
Question 88
1 mark · Easy
Answer and see the solution →State the SI unit for pressure.
Question 89
1 mark · Easy
Answer and see the solution →Complete the following sentence: Pressure increases if the same force is applied over a ________ area.
Question 90
2 marks · Easy
Answer and see the solution →A force of 150 N acts at right angles on an area of 0.5 m². Calculate the pressure exerted. Give your answer in pascals.