本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb; t/ l! Y! ^9 z2 ~; p% k
+ d$ q4 y; P2 Y公仔箱論壇If you are not a Physics person, read on and learn a fact of physics.
% `' S+ Y$ r# [5.39.217.76AMAZING! 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。' h( I8 a: m. e' A' y
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Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
7 ^* o/ [' z- F! `( q. H5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5.39.217.76/ y }" S4 W# ]. p: z8 H
It is located in the city of Magdeburg, near Berlin.
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9 z" m1 n8 m( {* C }tvb now,tvbnow,bttvbThe 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。0 {1 v5 P: n7 b/ u- v
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇+ i$ y, s5 s# l$ Q5 P8 D. R0 V# W
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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,
% j0 j w$ g0 `' |* R6 h' atvb now,tvbnow,bttvbOr just the weight of the water?
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Answer:; d6 n+ f; l3 n# f. r$ e
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It only needs to be designed to withstand the weight of the water!
0 P) `" H/ p* b! p( C: [+ W6 p8 ^* e$ BWhy? 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 Germany5.39.217.76* }7 c& T6 B5 T/ v V3 c
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.公仔箱論壇/ j1 P) g4 K$ P+ s. a
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. tvb now,tvbnow,bttvb: v/ m6 C3 l3 t) s1 H. a
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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。7 ], `7 T0 ~5 ]2 Q
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