Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Solids, Liquids and Gases
279 practice questions
Topics covered
Practice questions
51–60 of 279
Question 51
2 marks · Easy
Answer and see the solution →Explain why the pressure in a liquid increases with depth.
Question 52
2 marks · Easy
Answer and see the solution →A liquid has a density of 1100 kg/m³. The pressure difference between two points is measured as 22,000 Pa. Gravitational field strength is 10 N/kg. Calculate the difference in depth between the two points.
Question 53
3 marks · Easy
Answer and see the solution →A rectangular tank is filled with a liquid to a depth of 1.2 m. The density of the liquid is 950 kg/m³. g = 10 N/kg.
(a)[2 marks]Calculate the pressure at the bottom of the tank due to the liquid.
(b)[1 mark]State one way to increase the pressure at the bottom of the tank.
Question 54
2 marks · Easy
Answer and see the solution →A weather map uses isobars to show regions of equal atmospheric pressure. Explain why areas where isobars are close together often experience strong winds.
Question 55
3 marks · Easy
Answer and see the solution →Figure 1 shows a simple barometer using oil instead of mercury. The oil has a density of 900 kg/m³. The height of the oil column is 1.4 m. Take g = 10 N/kg.
Figure 1: Simple oil barometer (a)[2 marks]Calculate the atmospheric pressure in Pascals.
(b)[1 mark]Suggest why mercury is usually used in barometers rather than oil.
Question 56
4 marks · Normal
Answer and see the solution →A diver is swimming in a freshwater lake. The density of freshwater is . The gravitational field strength is .
(a)[3 marks]Calculate the pressure difference between the surface and a point 3.5 m below the surface.
(b)[1 mark]State two factors that would cause the pressure at the same depth in another liquid to be greater.
Question 57
2 marks · Normal
Answer and see the solution →Explain, using ideas about forces, why the pressure at the bottom of a swimming pool is greater than the pressure at the surface.
Question 58
4 marks · Normal
Answer and see the solution →A scientist designs a rectangular tank filled with oil. The base measures 0.80 m by 1.20 m. The oil has a density of 900 kg/m³. The height of the oil column is 2.0 m and g = 10 N/kg.
(a)[2 marks]Calculate the pressure difference between the top and bottom of the oil in the tank.
(b)[2 marks]Calculate the force exerted by the oil on the base of the tank.
Question 59
1 mark · Normal
Answer and check →Which row correctly shows the combination that would give the greatest pressure at the bottom of a liquid column, according to ?
- A.High h, low ρ, low g
- B.Low h, high ρ, low g
- C.Low h, low ρ, high g
- D.High h, high ρ, high g
Question 60
3 marks · Normal
Answer and see the solution →A student makes a homemade water barometer. The atmospheric pressure supports a column of water 10.0 m high. The density of water is 1000 kg/m³ and g = 10 N/kg.
(a)[2 marks]Calculate the pressure the atmosphere is applying to the water.
(b)[1 mark]State one reason why mercury is often used in barometers instead of water.