本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 0 U+ G& a* H0 q; e% i- v- a
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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!公仔箱論壇- j3 F0 j4 I" E; u; D! Q% r" E5 i+ v
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% P' I2 B! }" {+ s2 q: {3 oMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
1 w* r& K x7 @& H# @) XThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 8 `. `0 Z1 ]. G9 s% P ?" b
It is located in the city of Magdeburg, near Berlin., D) [0 v: ]) K3 }
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The photo was taken on the day of inauguration.
* |5 E6 b R4 X; ZTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.% U+ m4 N3 Q$ Q" Q# D" K
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Question:
2 n) J- P+ j2 {8 y' BTVBNOW 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。
$ N1 @% [7 g' ^6 O公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,. T U, b0 |. _$ d6 M' Y6 j$ ^
Or just the weight of the water? 4 j% f5 k# t* e4 R9 I( r& D2 k
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Answer:
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It only needs to be designed to withstand the weight of the water! 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。4 {5 ~# T2 `* W# J' @
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
( ], v$ D( F# x4 X7 e公仔箱論壇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.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。: d: H! p, S7 Y! C1 N2 V
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. 5.39.217.76, o9 |/ C* k: M, B1 R( I) y
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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. 公仔箱論壇& g. w1 x) v5 r
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