【Short Track Speed Skating Tonight Rush gold Snow Race postponed due to snowfall】
The Beijing Winter Olympics entered its ninth day today, and today's capital Beijing has opened the snowfall mode. The freestyle skiing women's steeplechase qualification tournament in which Arigu Ailing competed was originally scheduled to take place today, but due to snowfall, the highly anticipated event was postponed to 10 a.m. tomorrow, with Gu Ailing in third place and another Chinese player Yang Shuorui in 24th place. The final will take place at 9:30 a.m. the day after tomorrow.
This evening, the Chinese team will strive for gold in the short track speed skating of the traditional advantage event.
The short track speed skating men's 500m event is Wu Dajing's defending battle. At the Pyeongchang Winter Olympics, Wu Dajing resisted the pressure to win the only gold medal for the Chinese delegation. Starting at 7 p.m. tonight, he will start from the quarter-finals. His biggest rivals are Hwang Dae-hyun of South Korea and Liu Shaolin of Hungary. Alongside Wu Dajing, ren ziwei and Sun Long of the Chinese team, among them, Ren Ziwei will continue to attack the third gold of the winter olympics.
In addition, the short track speed skating event will also determine the gold medal in the women's 3000 meters relay. In the previous semi-finals, the Chinese team led by Fan Kexin and Qu Chunyu advanced to the second place in the group. In tonight's 7:44 final, the Netherlands, South Korea, Canada and other teams are the main competitors, and the Chinese team won the gold medal in the event at the 2010 Vancouver Winter Olympics.
【Popular Science Tips】
Why are ski races afraid of snow?
First of all, snow will have an impact on the track. First, the accompanying heating when it snows will affect the snow temperature and snow quality of the track, so the type and amount of waxing of the athlete's snowboard needs to be adjusted accordingly. Second, the new snow brought about by snowfall will make the surface of the track soft and the friction increase, which is not conducive to the players. And the low visibility in snowy weather will affect the vision of athletes and referees. Especially for athletes who are sliding at high speeds, it is very dangerous.
Why do artificial snows have to be used on the ski tracks of the Winter Olympics?
Many netizens said that the players are competing in the snow, is not it more like the Winter Olympics? Why does natural snowfall have an impact on the track? Aren't they a kind of snow?
That's right, the snow on the ski tracks of the Winter Olympics is not natural snow, but artificial snow.
Many factors have made it difficult for natural snow to meet the requirements of international competitions. First of all, the amount of snow used in the race is very large, the impact of the comprehensive melt coefficient and the requirements of the International Snow Federation for ski snow, the amount of snow required by the track must reach at least 107,200 cubic meters, which is difficult to meet through natural snowfall. Experiments have shown that 3 meters thick natural snowfall, after snow pressing can get 30 to 40 cm of snow layer, carrying natural snow to the terrain complex up the mountain to build a ski slope its transportation cost is too high.
Secondly, natural snow cannot meet the requirements for the stability of the "ice-like snow" used in alpine skiing competitions at the Winter Olympics. Naturally condensed snowflakes are unstable in nature, high water content, high fluffiness, short snow storage cycle, high temperature and sunlight and other factors are very easy to melt, and then pre-cold ice leads to changes in hardness, which has a certain obstacle to athletes competing and making difficult moves.
Artificial snow is not snowflakes, but Xiaoice that have been broken into pieces, its density is more than twice that of natural snow, coupled with its low water content, long storage time, not easy to melt and decompose and other advantages make its paved ski slopes stronger, and the friction of skis is less, so it is more suitable for ski resorts.
For alpine skiing tracks that have already been prepared, new natural snowfall is detrimental to the race. Newly falling snow, melted and re-condensed snow and long-standing snow have different physical properties, and mixing together can affect the stability of the snow on the field.
Reporter: Wang Weifan
