Traditional Culture Encyclopedia - Weather inquiry - Why is the water at 30 degrees a little cold and the weather at 30 degrees very hot?
Why is the water at 30 degrees a little cold and the weather at 30 degrees very hot?
Let it catch on. Thermal convection: thermal convection refers to the heat transfer mode in which hot and cold fluids are mixed due to the macroscopic movement of fluids. This heat transfer only occurs in liquids and gases. Due to the irregular thermal motion of molecules in fluid, convection is inevitably accompanied by a large number of heat transfer phenomena in real life. For example, we boil water with fire, roast mutton kebabs with charcoal fire, roast our hands with fire when we are cold, warm our mattresses and so on. Let children learn physics knowledge when they grow up. Learning physics can explain many natural phenomena.
It depends on the bathing season and indoor temperature of the child. As the saying goes, there is not a day in June when the temperature of bath water at 30 degrees is lower than the normal temperature of human body. Children and the elderly will feel very uncomfortable. Of course, they may even cause a cold. Water is flowing, so is air, but compared with water, air is very small.
Therefore, if we are at 30℃, we will feel hot, because our skin is cooling, but the air flow is weak, so the efficiency of the cooling system is not very high, so the heat generated by our body cannot be released, and we will feel hot. When we take a bath, we still feel very cold even in water at 40 degrees Celsius. Although the water temperature is higher than that of human body, the heat dissipation efficiency of human skin is very fast due to the flow of water. The heat generated by our bodies is less than the heat absorbed by water, which makes us feel very cold.
- Related articles
- General steps and precautions of mural advertisement
- Why do British people like to talk about the weather?
- How to do English weather forecast?
- What skin care products are good for hot weather?
- What cartoon characters are these three pictures?
- The weather forecast says there will be a typhoon. Is it true?
- Drunk four-character idiom
- Why does Wuxi plane close the window?
- When does the stone flower branch?
- What are your strategies for traveling to Hengshan Mountain in Nanyue?