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2.3 Transfer of thermal energy

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Question 35

A vacuum flask is designed to keep drinks hot by reducing thermal energy transfer. It has a double-walled glass container with a vacuum in the space between the two walls.

Which method or methods of thermal energy transfer does the vacuum prevent?

A

conduction and convection

B

conduction and radiation

C

convection and radiation

D

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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