"I am not afraid of rain on the first day, and I am afraid of rain the next day." Today is the second day of August. What is there to be afraid of when it rains?

Not afraid of rain on the first day, but afraid of rain on the second day. Today is the second day of August. There is nothing to be afraid of when it rains, as follows:

August of the lunar calendar is considered as a special month, which is endowed with multiple meanings among the people, symbolizing bumper harvest, good luck of the group and so on. Therefore, people will hold various activities at this time, such as enjoying the moon, having a reunion dinner and offering sacrifices to their ancestors, to express their reverence for nature and their nostalgia for their ancestors. It can be said that August of the lunar calendar is an unusual month.

Rain is a natural landscape, but the water on the earth is turned into steam and evaporated into the air after being irradiated by sunlight. Water vapor condenses into small water droplets when it meets cold air at high altitude. These water droplets are very small.

The diameter is only 0.0 1 ~ 0.02mm, and the maximum is only 0.2mm ... They are small and light, and they are held up in the air by the updraft in the air. It is these small water droplets that gather in the air to form clouds. These small water droplets will become raindrops and fall to the ground, and the volume will increase by about 1 10,000 times.

Nature:

When it rains, how do these small water droplets increase their volume to more than 1 10,000 times? Mainly by two means: one is condensation, and the other is the increase of cloud droplet collision. In the initial stage of raindrop formation, cloud droplets mainly condense and condense themselves by constantly absorbing water vapor around the cloud.

If the water vapor in the cloud can be constantly replenished and replenished, so that the surface of the cloud droplets is often in a state of supersaturation, then this condensation process will continue, making the cloud droplets grow and become raindrops. But sometimes the water vapor content in the cloud is limited, and in the same cloud, the water vapor is often in short supply, so it is impossible to make every cloud drop grow into a bigger raindrop.

Some smaller cloud droplets must be merged into larger ones. If there are water droplets and ice crystals in the cloud, the process of condensation and sublimation will be greatly accelerated. When the cloud drops in the cloud increase to a certain extent, due to the increasing volume and weight of the large cloud drops, they can not only catch up with the slow small cloud drops in the descending process.

And it will "swallow" more small clouds and make itself stronger. When the big cloud drops get bigger and bigger until the air can no longer hold them, they will fall straight from the clouds to the ground, which becomes ordinary rain.