Question

why does our tongue stuck to the cold pole when we lick a cold pole

Answer 1

as our tongue toches the cold surface the moisture present on tongue gets freezed

Answer 2

When the tongue makes contact with the pole, the heat is rapidly transferred, cooling the tongue and forcing the body to send warmth in the form of blood and heat energy. The problem is that, today, most metal flag poles are made up of aluminum or steel (an iron alloy with carbon), making them fine heat conductors. The pole absorbs the heat quite readily, literally sucking the warmth from your tongue faster than your body can supply it. The saliva on your tongue then freezes (provided it is below freezing), with the resulting ice latching onto the flagpole and your very porous tongue. You are stuck. Materials that are less ideal conductors of heat won't provide this same rapid effect, nor even in many cases are they capable of cooling the surface of your tongue faster than your body can heat it to keep it above freezing. In some cases, the material might even have an insulating effect.

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