Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Solids, Liquids and Gases
279 practice questions
Topics covered
Practice questions
131–140 of 279
Question 131
1 mark · Normal
Answer and check →Which change would double the pressure difference between two points in a liquid?
- A.Double the depth between the points.
- B.Halve the density of the liquid.
- C.Double the area at the bottom.
- D.Halve the gravitational field strength.
Question 132
2 marks · Normal
Answer and see the solution →A student measures the depth and pressure difference in a tank of an unknown liquid. The table shows her results. Calculate the density of the liquid.
Depth (m) Pressure Difference (Pa) 0.50 4900 1.00 9800 1.50 14700 Take .
Question 133
3 marks · Normal
Answer and see the solution →Describe an experiment to show that the pressure in a liquid increases with depth. Your answer should include the apparatus needed and how you would take measurements to show the pattern.
Question 134
2 marks · Normal
Answer and see the solution →A mercury column in a barometer stands at 0.60 m high. The density of mercury is 13,600 kg/m³. Use g = 10 N/kg.
Calculate the atmospheric pressure in Pascals.
Question 135
4 marks · Normal
Answer and see the solution →A reservoir contains a liquid with density . The reservoir is 15 m deep. Take .
(a)[2 marks]Calculate the pressure difference between the surface and the bottom of the reservoir.
(b)[2 marks]If a pipe runs from the bottom of the reservoir up to a point 7.5 m above the surface, what is the pressure difference between the bottom of the reservoir and the outlet of the pipe? Explain your reasoning.
Question 136
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 137
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.)
Question 138
5 marks · Normal
Answer and see the solution →(a)[2 marks]A glass block has dimensions 0.2 m × 0.10 m × 0.05 m and a mass of 2.5 kg. Calculate the density of the glass. State the correct unit.
(b)[3 marks]The block is laid flat on a table. Calculate the pressure it exerts on the table. Give your answer in pascals.
Question 139
4 marks · Normal
Answer and see the solution →The table shows mass and volume measurements for three different liquids. Liquid Mass (g) Volume (cm^3) A 55 50 B 44 50 C 120 100 (a)[2 marks]For each liquid, calculate its density in g/cm³. Write your answers in the table below.
Liquid Density (g/cm³) A B C (b)[2 marks]Liquid B is poured into a tank to form a layer 0.15 m deep. Calculate the pressure at the base of the tank caused by this layer. (Take gravitational field strength as 10 N/kg. Give answer in pascals. 1 g/cm³ = 1000 kg/m³.)
Question 140
4 marks · Normal
Answer and see the solution →A diver descends to a depth of 25 m in the sea. The density of seawater is 1050 kg/m³.
(a)[2 marks]Calculate the increase in pressure on the diver at this depth due to the water alone. Use g = 10 N/kg. Give your answer in kPa.
(b)[2 marks]State and explain why the pressure inside the diver's air tank must be greater than the pressure at this depth.