本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 # M5 w. w, k# d$ r: D; @9 s4 ~* x
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If you are not a Physics person, read on and learn a fact of physics.
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8 {( I$ H- O$ f; z) F x) ?# L5.39.217.77:8898Even after you see it, it is still hard to believe!
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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。9 C- O, J; z; x* w( }
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
" z9 L% V9 w) w9 A3 o5 U. p) r3 zTVBNOW 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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5.39.217.77:88984 T$ Q2 ]8 X5 k" ?5 c
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.公仔箱論壇+ A3 l2 u8 |' Q5 }7 X) E
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
* ^3 y" i s7 e. \Or just the weight of the water? tvb now,tvbnow,bttvb5 q7 b5 V6 l: m0 g: |
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Answer:
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1 J2 n8 y: M" G2 F1 W) |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。It only needs to be designed to withstand the weight of the water!
2 @# s. R: j, J/ p# y- b# j公仔箱論壇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' ~* i9 z% {7 P2 p. I7 h
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The Incredible Magdeburg Water Bridge in Germany
9 Y2 H* ~) L/ H' V! L/ _tvb 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.
) |4 ^0 g$ b& g4 o; A4 r公仔箱論壇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. # X5 ?9 K) Z( l) e
0 n5 k* Z! O Y* z# S8 nConstruction 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. ' M" n0 ?6 s, K6 a! x
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0 ]9 X% l8 }) 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。5.39.217.77:8898$ z# W% Z- h+ m: i" @
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tvb now,tvbnow,bttvb6 s! ~& p& h/ V/ t6 W- W4 F
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