why when you touch a blanket in a cold night u find that it's not cold?

Answer 1

its bad conductor of heat. when it is put on some object the blanket will not allow heat to escape, so it will remain warm.

Answer 2

2 answers:
a) If it's one you are sleeping under, you have warmed it.

b) If it's a blanket sitting away from a body or source of heat, the reason it doesn't feel cold is because of its low thermo-conductivity. That is, blankets are (by design) bad conductors of heat energy. So when you touch it, your skin only has to heat the very small part of the blanket that is in contact with your skin.

In contrast, if you touched a cold piece of copper (which chef's know conducts heat quite well) you would have to heat the part that is in immediate contact with your skin, but that part of the copper would conduct the new heat away from your skin to other cold copper, and your skin would have to heat the copper it's touching again and again. This is why copper feels colder.

It's the same difference for a cold piece of wood and a cold piece of steel. The initial difference between how cold the two feel when you pick them up is directly related to their thermal conductivity. A blanket is designed to contain heat energy and not conduct it.

Answer 3

fabric is a poor conductor of heat....when you feel something and you feel.."cool"....that feeling is heat being conducted from your body to the object that you touch....that object will cease being cold when it reaches your body temperature. This is all a matter of heat transfer...somethings, like fabric dont transfer heat or cold very well.

Answer 4

Is this a 3 bears question? Sort of like who has been sleeping under my blanket?

Answer 5

Its a very good insulator so it does not conduct heat away from your hand.