Hair dryer: uses resistance wire to heat the air to increase the temperature of the moisture on the hair, and uses the motor to speed up the flow of air on the surface of the moisture on the hair. At the same time, the wind can also make the hair float and increase the surface area of ??moisture on the hair. , thus accelerating the evaporation of water from the hair.
People talk about white gas: the air exhaled from the body has a higher temperature and contains more water vapor. When encountering the cold environment outside the body, it cools down and liquefies into small water droplets, which is white gas.
White gas in the refrigerator: In summer, the air temperature is high. When the refrigerator is opened, the water vapor in the air cools down and liquefies into small water droplets, which is white gas. The principle is the same as when a person exhales white breath when speaking. Note: It is not the white gas that comes out, but the liquefaction of water vapor around the refrigerator door.