Why do hot objects cause burns? Detailed answer

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Why do hot objects cause burns? Detailed answer

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Why do hot objects cause burns?

We have all experienced that fire and hot objects cause a painful sensation. The child does not know this - and gets burned. We are learning from our own experience.

In a hot iron, the atoms vibrate at a tremendous frequency - perhaps up to a million vibrations per second! If we touch the iron with the tip of our finger, we will feel pain, as the fast moving particles will cause our skin molecules to move sharply and quickly as well. You will feel this rapid movement as pain - that's why hot objects burn.

You can imagine how fast the molecules must move in order for the skin to get this feeling. Let's take this comparison as an example. At the melting temperature of ice, which is not hot at all, hydrogen molecules move at a speed of more than 1700 m/sec!

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

From whom did the Tibetans inherit the genes that make life easier in the highlands?

The Tibetan genome contains an allele of the EPAS1 gene, which increases the presence of hemoglobin in the blood, which explains their adaptability to life in high mountain conditions. No other nation has this adaptation, but exactly the same allele was found in the genome of Denisovans - people who do not belong to either Neanderthals or Homo Sapiens. Of all the hypotheses, the most probable is that many thousands of years ago the Denisovans interbred with the common ancestors of the Chinese and Tibetans. Subsequently, the Chinese living on the plains lost this allele as unnecessary, while the Tibetans retained it.

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