为什么我们感觉冷（Why do we feel cold）.docVIP

为什么我们感觉冷（Why do we feel cold） 1, why do we feel cold? Perhaps a lot of people will scoff at the problem and think its too simple to answer. The cold sensation comes from the nerves response to loss of body heat, which depends on the rate at which the body loses heat. When your hands soak in cold water, immediately touch the object above the water temperature, there will be a warm feeling, even if that object temperature is far below your body temperature. Presumably many people have had such experiences, that is to say, your feelings are not so loyal to respond to the external environment, and occasionally cheat you. The reaction of heat and cold is the flow of heat rather than the absolute temperature. Your illusion of warmth actually comes from the difference between your local temperature (your hands) and the temperature of your body, rather than the temperature difference between your body temperature and the temperature. Is the degree of 2 cold determined by the temperature alone? After recognizing that common sense, a lot of people fall into another misunderstanding. The lower the temperature of the human body, we feel, the colder it feels. Because in their view, the larger temperature difference obviously makes the heat flow faster, the human body will feel colder. This view is not entirely accurate, because in the case of constant body surface area, and the two volume heat conduction rate Q, temperature gradient (temperature difference method in vector partial derivative), which is the difference between the ambient temperature and the temperature of our body size is only one another; is the thermal conductivity of K medium. The heat transfer rate is proportional to the product of the two factors. In other words, the thermal conductivity and the temperature gradient are equal in influencing the heat transfer rate. 3 what are the factors that affect the heat transfer rate in the south? When talking about the sense of body in the north and south winter, the hu