Q173
On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because :
A.
Metals have higher thermal capacity than plastics
B.
Plastics have a lower density than metals
C.
Metals are good conductors of heat
AnswerD.
Plastics have a higher thermal conductivity than metals
Answer: Option C
Solution
Answer: Option C
Solution:
On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because metals are good conductors of heat.