本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 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。6 U/ q- ?% g- J/ H
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If you are not a Physics person, read on and learn a fact of physics.
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Even after you see it, it is still hard to believe!
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% B3 f' q. O' P$ N/ j5.39.217.76Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 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。9 }+ S" o8 O. `
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 公仔箱論壇2 }- f' q7 N2 M2 _4 Y
It is located in the city of Magdeburg, near Berlin.
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+ \1 E, K, ]6 G: jThe photo was taken on the day of inauguration.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。3 D3 d+ h) h+ {/ s5 U: O9 o
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
0 p- W9 x6 G# ITVBNOW 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。
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0 ]$ d3 y' B0 h0 f7 K( Ptvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb+ p* |6 N0 _7 B& \: U# i% L; X5 D
Or just the weight of the water? 公仔箱論壇 I# G# z7 O, i$ @
G. w/ O b0 t3 u0 }0 n4 {5 y5.39.217.76Answer:
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* M2 c) G8 M4 P0 v2 g& TIt only needs to be designed to withstand the weight of the water! ; i0 i( l1 W* k7 M, c# _ ]& G
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
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The Incredible Magdeburg Water Bridge in Germany
% e/ {& t q6 ~& j9 iTVBNOW 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。The 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.
. j2 o3 b$ o$ S1 p+ ~, }. p! tTVBNOW 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。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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Construction 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. $ T7 s1 P$ e8 B3 t
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