Just left by themselves in a colder environment, metals and ceramics and stuff get significantly colder to the touch than plastic objects or similar materials, like wood or cloth. Why?
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They’re not actually colder; they **feel** colder.
You don’t feel temperatures; instead, you feel rates of heat transfer between your body and the object you’re touching. That rate of heat transfer is partially dependent on the heat capacity and conductivity of the object. Metals and water have *way* higher heat capacities and thermal conductivities than wood or plastic, and so they end up feeling cooler to the touch at room temperature.
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