GENERAL KNOWLEDGE

Detailed explanation-1: -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 metals are good conductor of heat, so they could absorb and release heat in a better way than insulators.

Detailed explanation-2: -A: In general, metals feel colder or hotter to the touch than other materials at the same temperature because they’re good thermal conductors. This means they easily transfer heat to colder objects or absorb heat from warmer objects.

Detailed explanation-3: -D) Plastics have a higher thermal conductivity than metals. Hint: The relation between the temperature of the surroundings and the material property has a role to play in feeling being colder than another material kept in the same temperature.

Detailed explanation-4: -The metal, in contrast, is a good conductor of heat-it carries heat away quickly. Heat flows from your hand into the metal and then is conducted rapidly away into the bulk of the metal, leaving the metal surface and your skin surface relatively cool. That’s why metal feels cool.

Detailed explanation-5: -This is because, when you touch a piece of metal, energy conducts away from your fingers into the metal, lowering the temperature of your fingers. Plastics are good insulators so, even though the plastic is at a lower temperature than your fingers, little energy conducts to the plastic and it feels warm.