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2.2 Thermal properties and temperature

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Question 39

The temperature of the water at the bottom of a waterfall is greater than the temperature of the water at the top.

The gravitational potential energy of the water at the top is transferred to thermal energy at the bottom.

The specific heat capacity of water is 4200 J/(kg⋅∘C)4200\text{ J}/(\text{kg}\cdot{}^\circ\text{C})4200 J/(kg⋅∘C), and the acceleration due to gravity is 10 m/s2.

What is the temperature difference for a waterfall of height 84 m?

A

0.02 ∘C0.02\ ^\circ\text{C}0.02 ∘C

B

0.20 ∘C0.20\ ^\circ\text{C}0.20 ∘C

C

2.0 ∘C2.0\ ^\circ\text{C}2.0 ∘C

D

20 ∘C20\ ^\circ\text{C}20 ∘C

Markscheme

2.2 Thermal properties and temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.2 Thermal properties and temperature

528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.

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