本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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! }$ D% ~8 g+ V3 Y* nIf you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb. ?8 Z8 [$ P7 S3 m7 H0 z1 [7 @
AMAZING! 公仔箱論壇/ }, f$ R# }+ a/ g% Z
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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!
( I1 \4 R3 A r5 A. N9 }5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5.39.217.762 w$ G' i; g7 S b1 r! a
It is located in the city of Magdeburg, near Berlin.4 ?' T7 F$ ], {% [- M! P' U
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The photo was taken on the day of inauguration.
- \) d: `% X2 r3 J; S公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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; M( C0 e. X X3 WDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
, K+ u& y. ]* D6 \ p j u7 P5.39.217.76Or just the weight of the water?
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Answer:
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0 I; s1 |, s$ I2 z( b# v" {0 X( k* |tvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of the water! 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。 X% ^2 F+ E& w
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedTVBNOW 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。* e! u) Y' `! b1 e' g- ~8 ]8 U
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The Incredible Magdeburg Water Bridge in Germany
, ^4 P7 m$ o. N5 L- P7 r. X% u! \5.39.217.76The 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.
* J5 e0 E9 b: s$ \, O. _; b9 h( l! nThe 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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+ [8 t' Z& M( W g4 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。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. 公仔箱論壇: [, ]; G+ {( ~( I# V2 J+ u
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* [- @9 U6 @& Y& @1 k) i% H7 }) ^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。( O( g5 n% `7 k/ m4 R
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