Which of the above has the lowest thermal conductivity? a) Copper. c) Iron. b) Aerated brick. d) Vacuum e) Air
| December 31, 2020 | education
Vacuum has the lowest thermal conductivity.
This can be confirmed by the coefficient of thermal conductivity of the material:
clay porous brick = 0.26 W / (m * C)
copper = 386.9 W / (m * C)
iron = 74.4 W / (m * C)
air = 0.025 W / (m * C)
vacuum = 0 W / (m * C)
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