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2.3 Transfer of thermal energy

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Question 215

A vacuum flask is designed to keep liquids hot. The flask has double walls, with a vacuum between them. The glass surfaces facing the vacuum are coated with a shiny, silvered layer.

Which method or methods of thermal energy transfer are reduced by this shiny, silvered layer?

A

conduction and convection only

B

conduction only

C

radiation only

D

convection and radiation only

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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