本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 2 N' } a: z+ G( v
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If you are not a Physics person, read on and learn a fact of physics.
8 `) j" e8 f& D+ {5.39.217.77:8898AMAZING!
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9 C4 e: ~1 k c3 Y4 U' i: ?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! . Z; G4 N4 P; n4 s5 T
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
, G) m. c' M a0 ^2 X: FIt is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
! T! C" Y# g8 v7 {5 Ktvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
' A/ U4 T" `6 ^, |- F1 g) I公仔箱論壇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 Z6 A* v) y. [( [+ e$ t
Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
4 A, E* M3 ?& H- f) Y0 OTVBNOW 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。Or just the weight of the water?
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Answer:7 l7 e3 E/ R- P' ]) V
, A* x0 g& w9 r7 g公仔箱論壇It only needs to be designed to withstand the weight of the water!
* f5 [6 { i7 s* k( e4 J W0 D& G* |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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, ]8 a! s& e( \2 q9 ^公仔箱論壇The Incredible Magdeburg Water Bridge in Germany
8 ] z& h6 Y! d& g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.
9 z7 c8 w: N4 hThe 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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+ W: m3 w0 O1 H8 H" Q* gConstruction 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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0 L7 i/ _1 m/ m! n* P5 C: u: PTVBNOW 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。公仔箱論壇) e9 y3 K" ~! F, f- i5 ~5 T
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