(a)[5]
Explain how the labelled parts of the vacuum flask keep the liquid cool by lowering thermal energy transfer. Name the processes involved.
(b)[1]
Suggest a material that would be suitable for the stopper.
Physics 0625 · IGCSE · Transfer of thermal energy
Transfer of thermal energy — practice question
Fig. 5.1 presents a cross-section of the interior of a vacuum flask that contains a cold liquid. The vacuum flask walls are made from glass.
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