What is windchill and questions about hypothermia?
WIndchill is a table used to compute what is the cooling on human naked skin from the temperature adjusted for the wind. Stronger wind means more cooling. The reason is that, in order to go from liquid to vapour (thus evaporate) water needs to take energy in form of heat. The same also happens when water goes from solid (ice) to liquid. The opposite happens when the water goes the other way; from vapour to liquid and from liquid to solid. It then releases heat energy and that is why when clouds form, they keep rising because what is called the wet adiabatic lapse rate is only half of that of the dry air. Hypothermia is very dangerous because the symptoms of it, after freezing and shacking, are a well being and careless feeling. It means that the brain doesn’t receive enough oxygen, as it happens in hypoxia, when we are high on a mountain or a cardiac attack is on its way and block an artery. It is therefore dangerous to be wet in a windy day because as moisture evaporates very fast in
