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2.3 Transfer of thermal energy

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Question 142

Four identical metal flasks are filled with equal volumes of hot water at 90∘C90^\circ\text{C}90∘C. The outer surfaces of the flasks are finished with different colours and textures.

Which flask will show the slowest temperature drop?

A

matt black

B

matt white

C

shiny black

D

shiny silver

Markscheme

2.3 Transfer of thermal energy Questions

  1. IGCSE
  2. /Physics
  3. /2.3 Transfer of thermal energy

301 exam-style questions on CIE IGCSE Physics 2.3 Transfer of thermal energy, covering 2.3.1a Thermal conductors and thermal insulators, 2.3.1b Explaining thermal conduction, 2.3.2 Convection, 2.3.3a Thermal radiation, 2.3.3b Surface colour and texture, 2.3.3c Rate of emission and absorption of radiation, and 2.3.4 Consequences of thermal energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.

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