-
Because the water vapor carries away the heat around the body, it feels like the temperature around the body is dropping. Wish.
-
We must first understand that the factors that determine people's feelings of heat and cold: When the temperature is moderate, the relative humidity in the air has less influence on the body's perception of heat and cold. The so-called moderate temperature means that people do not feel hot and cold, and this temperature is called "not feeling warm".
People's "insensitive to the environment" is different, such as the human body is not sensitive to the air is 24, and the water is not insensitive to the temperature is 34, which means that in 24 air and 34 water, people will feel lukewarm and very comfortable. Because the normal body temperature of a person is 37, in the air, 24 of the air will take away part of the heat of the human body, and the heat generated in the body will make up for the part of the heat taken away by the air, so that the heat lost by the human body is exactly equal to the heat generated in the body, and the human body maintains a relative thermal balance, making people feel good. When the ambient temperature is lower or higher than the non-sensitive, people will have a noticeable sense of cold or heat.
At this time, relative humidity will play a great role in the human body's sense of heat and cold. For example, when the air temperature is 25 and the relative humidity is 30%, the human body does not have any feeling of heat and cold (i.e., comfortable); At the same temperature, if the relative humidity increases to 95%, the human body will feel stuffy. ......The feeling of heat and cold in the human body is also related to the strength of the wind.
In winter, when you are stationary or walking, you will feel just right in your clothes, but if you get on a Mercedes-Benz truck or a car or train with wide windows, you will immediately feel the wind blowing loudly and your body will be cold. This is because the wind can blow away the air insulation around the human body, taking the heat away. In general, the stronger the wind, the faster and more heat is lost by the human body.
From the experiment, it can be roughly calculated that when the temperature is above 0, the cold feeling of people will decrease by 3-5 for every 2 levels of wind increase; When the temperature is below 0, the cold feeling of people will drop by 6-8 for every 2 levels of wind strength. That is, a person's feeling of heat and cold is determined by temperature.
Humidity. Wind speed is determined together, rainy days, one is low temperature, the other is windy, although the humidity is high, but at this time the first two are the dominant factors, we will feel cold.
-
Haha, I'm studying physics, I'll tell you about it:
1.In summer, when the earth is hot, the water falls to the ground to absorb heat and become steam, and the water into steam is an endothermic process, so the water evaporates and absorbs the heat of the surface and air, and then it rises into clouds.
2.So why does it feel hot when it rains? Because water absorbs heat and evaporates into water vapor, and there is more water vapor in the air, it is difficult to release the water vapor in the human body, because people also rely on the mechanism of water absorption and heat absorption into steam to cool the body, so the concentration of water vapor in the outside is large, and people cannot rely on this process to shoot heat, so it is very hot.
3.The drop in temperature after rain in the region is also related to the cold air brought by the clouds.
I'm so tired from fighting, so I'll be sure to share it with you.
-
More than 360 days a year, every day is almost different, but it can probably be divided into two kinds: sunny days and rainy days, sunny days will make people feel happy, the sun shines on the body, there will be a feeling of relaxation, in rainy days will make people sad, always feel that they have lost something, regularly find that it will be very hot before the rain, why is it very cool after the rain? The rain that falls from the sky, turns from gas to liquidThis process is to release energy, so it will be very hot before it rains, and when it falls to the ground, it will turn into gas, and in turn absorb energy, so it will be very cool after rain.
-
Because only when the temperature is lower, water droplets can be formed, and rain can be formed. And after the rain, the air evaporates and takes away the heat. This will result in a relatively low temperature.
-
Before rain, the air pressure is high and it cannot flow, which makes it feel hot, but after rain, the humidity in the air is high and the water vapor evaporates and absorbs heat, so the temperature decreases.
-
This is the role of liquefaction cooling and endothermy. If it rains in very hot weather, the air will liquefy when it is cold, and then absorb heat, which will make people feel the effect of lowering the temperature.
-
Because the rain evaporates and takes away the heat from the atmosphere, it is always fresh and cool after the rain, and the muggy heat before the rain is due to the increase in air pressure.
-
.In summer, when geothermal water falls to the ground and becomes steam, and water becomes steam, which is an endothermic process, so water evaporates and absorbs heat from the surface and air.
-
Dark clouds are blocking the sun!!
Strengthening the spleen should soothe the stomach, spleen deficiency will not be a single manifestation, Sun Simiao once cured the spleen deficiency of a village household with a post of Poria cocos; >>>More
Ants: When heavy rain is approaching, ants move their homes to higher ground, so seeing ants moving is often a sign of a heavy rain. >>>More
Department of Enuresis, Heping Traditional Chinese Medicine Chronic Disease Hospital, Shijiazhuang, Hebei Province, I am the director of Sui. Children urinate more often at night, there are many reasons, generally related to the bladder sphincter function is not fully developed, with the growth of age will be fine, in order to make him as soon as possible and normal children, you need to pay attention to the following diet, eat less sugar during the day, drink less drinks, eat less snacks, do not eat winter melon, do not drink red bean soup; Eat more vegetables, fruits, walnuts, and if possible, you can eat some pork kidneys, sheep kidneys, etc. In addition, pay attention to the following aspects of diet and daily life: >>>More
It's a long one down there, but I'll say it, it's mainly for survival, ants build nests, and when it's not raining, they're usually in a cool and dry place, but when it rains, the nest gets watered, so they move.
As the emperor, Li Shimin cares about the people, has a lot of work every day, too little rest time, heavy workload, overwork, and accumulation, no matter how good his body is, he can't support it.