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2.3.4 Consequences of thermal energy transfer

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Question 23

A vacuum flask has a double-walled vessel with a vacuum in the space between the walls. How does this vacuum help to keep the contents of the flask hot?

A

It prevents loss of thermal energy by radiation.

B

It prevents loss of thermal energy by conduction and convection.

C

It increases the rate of conduction through the walls.

D

It acts as a good thermal conductor to keep the outer surface warm.

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2.3.4 Consequences of thermal energy transfer Questions

  1. IGCSE
  2. /Physics
  3. /2.3.4 Consequences of thermal energy transfer

62 exam-style questions on CIE IGCSE Physics 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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