Did 20 kg icicles fall from the sky and smash through the window, causing casualties?

The icicles falling from the sky did not cause any casualties. According to news media reports, a man in Harbin, Heilongjiang Province parked his car to chat with friends, and suddenly an icicle fell from the sky, directly smashing a big hole in the windshield. Fortunately, the party was just about to go out and get on the bus when the icicle suddenly hit the windshield. If he got on the bus two seconds earlier, he wouldn't be so lucky. After the incident, the property bears 80% of the maintenance costs.

First, the lethality of icicles

As we all know, although outdoor icicles can make people feel crystal clear in winter, they are also accompanied by huge security risks. The danger degree of icicles is related to their height, sharpness and outdoor temperature. The higher the icicle is, the greater the force generated when it falls, and the greater the damage to people or cars. If an icicle with a weight of 1 kg falls from a height of 10 m and hits the ground, its interaction time with the ground is about 0. 1 s, which is equivalent to the force of a heavy object with a weight of 14 kg hitting the ground. In addition, the lower end of icicles is generally very sharp, and falling vertically is like a big nail landing, which is very destructive. According to research, the egg-sized ice falling from the fifth floor will make the head swell, and falling from the twentieth floor may lead to death.

Second, stay away from icicles at high altitude.

I hereby appeal to everyone to stay away from places with icicles when walking outdoors in winter. For example, buildings, telephone poles, lighthouses and other tall buildings, the temperature is generally low in the morning and evening in winter, and the temperature rises at noon, which will cause the ice and snow to melt, leading to the fragmentation and fall of icicles, which seriously threatens the safety of others.

Third, how to prevent high-altitude icicles

It is not uncommon for people to be injured by falling icicles. This kind of accident happens almost every winter, so we must be vigilant. Remind everyone that when walking on the road, please try to stay away from the eaves. If you really can't dodge, you should use the hard objects around you to protect yourself in time.