Question text
17 The diagram shows the gap between a hot surface and a cold surface. The gap can contain air (gas), iron (solid), a vacuum or water (liquid). cold gap hot Which material in the gap allows the quickest transfer of thermal energy between the surfaces by conduction? A air (gas) B iron (solid) C vacuum D water (liquid)
17 The diagram shows the gap between a hot surface and a cold surface. The gap can contain air
(gas), iron (solid), a vacuum or water (liquid).
cold
gap
hot
Which material in the gap allows the quickest transfer of thermal energy between the surfaces by
conduction?
A air (gas)
B iron (solid)
C vacuum
D water (liquid)
Select your answer: