How does your breath help to warm your cold hand in winters?
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Why does blowing hard on our hands cool them, but just breathing on them warm them? This is essentially due to a difference in the speed of the airflow in each case. When we breathe out slowly on our hands, the warmth and moisture from our mouths has time to transfer to our hands, warming them up.
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It doesn’t help, on the contrary, breathing cools the hands. During breathing, condensation of water settles in the palm of your hand, water cools the surface of the skin faster than air, so your hands will freeze harder and faster. You can not warm your hands with your breath. The heat must be dry - put your hands in your pockets of clothing
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