Question : On a cold day when the room temperature is 15o C, the metallic cap of a pen becomes much colder than its plastic body, though both are the same temperature of 15o C, because:
Option 1: metals have higher thermal capacity than plastics
Option 2: plastics have a lower density than metals
Option 3: metals are good conductors of heat
Option 4: plastic have a higher thermal conductivity than metals
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Correct Answer: metals are good conductors of heat
Solution : The correct option is metals are good conductors of heat.
On a cold day, the metal cap of a pen gets significantly colder than its plastic body since metals are good conductors of heat. This implies they can transport heat more efficiently than other materials. On a chilly day, the outside air is substantially colder than the inside air. When the pen's metal cap is exposed to cold air, it swiftly transfers heat away from the pen and into the air. This causes the cap to seem cooler than the plastic body, which is a poor heat conductor. On a hot day, the reverse is true. The metal cap will conduct heat away from the pen faster than the plastic body, making it seem colder to the touch.
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