本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb4 U: c3 E/ R; M/ P7 Q
公仔箱論壇5 J8 X3 ]5 r5 j) s
If you are not a Physics person, read on and learn a fact of physics.
+ W/ z- Z" i9 ^: [公仔箱論壇AMAZING!
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j9 R9 |* R& T# J- C0 YEven after you see it, it is still hard to believe!( {% U% T Y5 S& z! v# [
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TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。5 ~. n+ Z z0 m: T
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
. y% L8 B4 @# v0 [This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. tvb now,tvbnow,bttvb" \, s1 e7 x* Y2 R' v2 B
It is located in the city of Magdeburg, near Berlin.
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* H! f) j* |& x1 A T) AThe photo was taken on the day of inauguration.5.39.217.76* p, B# g! N) n
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.8 {5 i/ H" }% p! a" P; j) @+ _
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Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.76( y% |9 k2 |5 ]# X
Or just the weight of the water? 公仔箱論壇3 f4 S: S3 [6 s5 J, U
6 ~5 P/ i/ g+ r, p7 mAnswer:
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It only needs to be designed to withstand the weight of the water! 公仔箱論壇) o& y/ @$ U! Z* y
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded5.39.217.76: T# [, u2 M0 d. x
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# s4 Z: ~& z* X. S/ OThe Incredible Magdeburg Water Bridge in Germany
) [/ F) F$ ?8 ztvb now,tvbnow,bttvbThe Magdeburg Water Bridge is a navigable aqueduct in Germany that connects the Elbe-Havel Canal to the Mittelland Canal and allows ships to cross over the Elbe River. At 918 meters, it is the longest navigable aqueduct in the world.5.39.217.761 [" d5 D; ]0 G8 B! l3 d1 l7 A* S
The Elbe-Havel and Mittelland canals had previously met near Magdeburg but on opposite sides of the Elbe Ships moving between the two had to make a 12-kilometer detour, descending from the Mittelland Canal through the Rothensee boat lift into the Elbe, then sailing downstream on the river, before entering the Elbe-Havel Canal through Niegripp lock. Low water levels in the Elbe often prevented fully laden canal barges from making this crossing, requiring time-consuming off-loading of cargo.
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5 {5 }* e) U `; @tvb now,tvbnow,bttvbConstruction of the water link was started as early as in the 1930s but due to the World War 2 and subsequent division of Germany the work remained suspended till 1997. The aqueduct was finally completed and opened to the public in 2003.
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9 `. i. x- f4 _7 s- V, O1 j vtvb now,tvbnow,bttvbTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。 H2 X- Y7 X3 {
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