13:02
NamoCSI
ตัวอย่าง Nania3 ดูวิดีโอทั้งหมด กดที่นี่
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Category : หนังตัวอย่าง,The Chronicles of Narnia: The Voyage of The Dawn Treader,ตัวอย่าง,
วันศุกร์ที่ 9 กรกฎาคม พ.ศ. 2553
Bowling FAIL
 | An embarrassing bowling FAIL turns into a WIN. Watch to find out. Thanks to: youtube.com/ViirtBR For more FAIL videos visit http://failblog.org | From: failblog Views: 1230737   16306 ratings |
| Time: 00:53 | More in Comedy |
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The Adidas Jabulani, The Worst Soccer Ball in World Cup History
 | Rabi Mehta, an aerospace engineer at NASA Ames in Mountain View said: "It's quite obvious. You're seeing a knuckle-ball effect," [Mehta said in a statement released by NASA.] He explained that when a relatively smooth ball with seams flies through the air without much spin, the air close to the surface is affected by the seams, producing an asymmetric flow. This asymmetry creates side forces that can suddenly push the ball in one direction and cause volatile swerves and swoops. From his research on tennis and cricket balls in wind tunnels, Mehta believes that the Jabulani ball will tend to knuckle at 45 to 50 mph, which coincides with the speed of the ball during free-kick around the goal area. Another point made by Mehta, is that a lot of the stadiums for the World Cup are located at high altitude (Johannesburg is at 5,500 feet) and this will affect the ball aerodynamics as well, since the air density is lower. At this high altitude, the ball will tend to fly faster (less drag) and swerve less (less lift). | From: tava2003dotcom Views: 542853  145 ratings |
| Time: 01:03 | More in Science & Technology |
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