本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
9 w9 M# x- B) MTVBNOW 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! K# m2 A e2 A0 z$ q5 uIf you are not a Physics person, read on and learn a fact of physics.
' B( X; f) G3 @" B公仔箱論壇AMAZING!
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; K% X( I, M3 _- Z5 QEven after you see it, it is still hard to believe!tvb now,tvbnow,bttvb; s2 d( t: o' u2 n, P$ z$ [% q2 ^
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$ ]9 S- w5 `( l: g% p5 T' s8 n/ Btvb now,tvbnow,bttvbMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
' {& D. ], O' u; T+ i& d5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
1 R7 A6 Q4 }: uIt is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb q3 d! X* F9 x9 S- a
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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6 B* N4 E; j [8 h# D5 e8 V5.39.217.76Question:
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0 w) k O, n" d公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
8 Y8 B. ]% D. a" G$ D0 V2 _3 W2 F5.39.217.76Or just the weight of the water? ( o& |9 j7 I) J) p4 _
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It only needs to be designed to withstand the weight of the water!
% `& T) w5 g* d; U3 d9 _9 Z& k6 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
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& d6 a8 ?) {' _. ^% SThe Incredible Magdeburg Water Bridge in Germany
* t- \( R# a, n0 v1 g6 I n6 qTVBNOW 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.
9 J. Q. @' S$ S1 x% }9 N* ltvb now,tvbnow,bttvbThe 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. " Q; U( x, S+ e$ c* _; e# v
# v( w" P5 V( T6 Y( ]7 i: bConstruction 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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5 p6 u' F9 o" t7 i' R) VTVBNOW 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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