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2 marksMechanical Properties of Materials

CAPE Physics Unit 1 · 2003 · Paper 2 · Question 9(b)

Gases have densities of 1 kg m⁻³ to 2 kg m⁻³ while solids have densities of 2 000 kg m⁻³ to 10 000 kg m⁻³.

Use the kinetic theory of matter to explain the difference in the order of the size of these densities.

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Other parts of this question

  1. 9(a)(i)a)Define the following terms: Density[8 marks]
  2. 9(a)(i)b)Define the following terms: Pressure[1 mark]
  3. 9(a)(ii)Derive the equation ΔP = ρgΔh where ΔP is the change in pressure in a liquid, g is the acceleration due to gravity and Δh is the change in depth in a liquid.[1 mark]
  4. 9(a)(iii)Explain how coastal winds are generated in the Caribbean.[1 mark]
  5. 9(c)(i)Calculate the pressure due to Liquid L at depths of 3.0 cm and 14.0 cm.[10 marks]
  6. 9(c)(ii)Find the net force acting on the Liquid L between planes AA₁ and BB₁.[1 mark]
  7. 9(c)(iii)Determine the weight of liquid between the planes AA₁ and BB₁.[1 mark]
  8. 9(c)(iv)What is the upthrust on an object which when placed in the Liquid L, caused the liquid level to rise from BB₁ to AA₁?[1 mark]

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