久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

您現(xiàn)在的位置: Language Tips> Easy English> Odd Question  
 





 
Why do golf balls have dimples?
[ 2006-01-09 08:00 ]
golfball  
Why do golf balls have dimples? Notes:

So that they look cute? NO!

Because the dimples maximize the distance golf balls travel. Dimpled balls travel up to four times farther than smooth-surfaced golf balls.

In the early days of golf, smooth-surfaced balls were used until golfers discovered that old, bumpy balls traveled longer distances. The science ofaerodynamicshelps explain the dimpled phenomenon. The dimples reduce the drag on a golf ball by redirecting more air pressure behind the golf ball rather than in front of it. The higher levels of pressure behind the golf balls force them to go far distances.

The dimples change the levels of pressure by bringing the main air stream very close to the surface of the golf ball. The dimples, or "turbulators," increase the turbulence in the layer of air located next to the surface of the ball. This high-speed air stream near the ball increases the amount of pressure behind the ball-thereby forcing the ball to travel farther.

 

 

 

 


aerodynamics:空氣動力學(xué)

 
 
相關(guān)文章 Related Stories
 
 
 

本頻道最新推薦

     
  為什么下雪時天氣暖
  You are the smartest fish I've ever seen!
  Dog burger
  為什么老了脾氣好
  飛蛾為什么撲火

論壇熱貼

     
  開個題目大家扯:hotel & restaurant
  追求某人
  請教工商年檢如何翻譯
  How to translate “中國老字號”into English?
  "港股直通車"怎么翻譯?
  兩免一補(bǔ)怎么說?




主站蜘蛛池模板: 久综合| 日本一级做人免费视频 | 欧美在线日韩在线 | 久久精品国产免费看久久精品 | 美女黄页网| 成人不卡视频 | 波多野结衣一区二区在线 | 狠狠色丁香婷婷综合久久来 | 在线日韩欧美一区二区三区 | 亚洲欧美精品一中文字幕 | 国产精品合集久久久久青苹果 | 亚洲精品一区二区三区不卡 | 久久福利国产 | 国产色在线播放 | 亚洲男人的天堂成人 | 国产久视频 | 草草影院第一页yycccom | 国产精品大片天天看片 | 成人性动漫高清免费观看网址 | 男女扒开双腿猛进入爽爽视频 | 男女猛烈无遮掩免费视频 | 日韩视频专区 | 国产精品莉莉欧美自在线线 | 老司机午夜在线视频免费观 | 美女张腿男人桶免费视频 | 日韩中文字 | 美女扒开双腿让男人桶 | 九色国产在线 | 九九九国产视频 | 久久九九免费 | 免费在线观看亚洲 | 在线视频区 | 91精品最新国内在线播放 | 男人的天堂久久 | 欧美精品人爱c欧美精品 | 成a人片亚洲日本久久 | 中国美女牲交一级毛片 | 日本特黄特色 | 9cao在线精品免费 | 91精品手机国产露脸 | 久久久久久久久久久视频国内精品视频 |