MCQOPTIONS
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| 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 | |