Discussion
On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because
Answer: C
Because metals are good conductors of heat.
Both parts are at 15 °C, but the metal cap draws heat away from the finger far faster than the plastic body does, and it is that rate of heat loss the nerves register as cold. The sensation reports conductivity, not temperature.
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