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 :

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plastics have a higher thermal conductivity than metals

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metals have higher thermal capacity than plastics

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plastics have a lower density than metals

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metals are good conductors of heat

1.	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
D.	plastics have a higher thermal conductivity than metals
Answer» D. plastics have a higher thermal conductivity than metals

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 :

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