本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇 } g- y1 R4 r6 | ?; F
AMAZING!
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Even after you see it, it is still hard to believe!
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6 g. F4 _& {9 u! FTVBNOW 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。Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
# ^! K" f' ? C9 b; E+ j公仔箱論壇This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. : o+ B5 b5 n! z( I9 {
It is located in the city of Magdeburg, near Berlin.
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: G2 U5 i$ ?0 xtvb now,tvbnow,bttvbThe photo was taken on the day of inauguration.
) R/ h5 H% a( ]( D9 |4 \tvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇 ?! C* o9 ]$ W* O* \9 e: j8 l
* n( u. y& x6 H: W& A% d! }5.39.217.76Question:
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* m! ~1 w, o! {# B; G; V6 i7 Q9 ~9 DDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.76' {+ c" w$ |6 {
Or just the weight of the water?
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Answer:
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! T; S# F6 Q2 x6 V% {公仔箱論壇It only needs to be designed to withstand the weight of the water!
& R* }! {, l/ K& `: Y, BWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedtvb now,tvbnow,bttvb- l& R, K4 [! y5 b0 G5 X) P
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。1 p5 X- k T2 m: F5 [3 w
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The Incredible Magdeburg Water Bridge in Germany) z7 M. \% M: q- K- |3 ?
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.
& {; w6 E+ _1 K6 }$ K* wTVBNOW 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 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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, y- W2 @$ x, w |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.
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