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. tvb now,tvbnow,bttvb: E) V1 ~- ~7 U
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Even after you see it, it is still hard to believe!$ U; |. P# C7 @
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb* ~! n% G. s) p# _
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
3 `8 r2 ?$ h- {% e5.39.217.76It is located in the city of Magdeburg, near Berlin.
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0 U" [4 w3 x3 t* r& O* KThe photo was taken on the day of inauguration.5.39.217.76" z0 K! A. g- d0 }( G
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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, @0 k; d" y# ~- E公仔箱論壇Question:5.39.217.769 A+ b+ `( j0 A. E; t' D; r
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
2 Q0 v1 G+ G* |, j公仔箱論壇Or just the weight of the water?
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Answer:
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; X( N9 @) d+ A8 g5.39.217.76It only needs to be designed to withstand the weight of the water! / u- ~$ F' B. w. S0 _* B
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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4 ~ x" Y9 L$ v公仔箱論壇The Incredible Magdeburg Water Bridge in Germany& }0 @6 v: D6 @
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.
/ K; G. |8 |" F, J! nTVBNOW 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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8 j/ I1 j# m& E7 h s6 b! |/ D0 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。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. 5.39.217.76' p4 O4 L j+ q4 x+ m: v2 d6 I( V) v
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' \; \. V) L" N5.39.217.76TVBNOW 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。0 k& m. G! c+ `
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: [9 I' z4 A$ g/ q; _4 @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。
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