本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 6 R5 p/ v/ b- a% Z
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If you are not a Physics person, read on and learn a fact of physics.
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6 |# d: R9 @# ~5 e7 |' hEven after you see it, it is still hard to believe!
, q1 g/ ` b: k) P& J5 I7 hTVBNOW 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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0 [+ G# q, g8 ~8 r) j5 a7 }2 KTVBNOW 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!
2 N1 W1 V( z4 y! @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.
4 W1 r/ f; N" B; @, \4 r7 ^It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
" A. ~2 x! P; A; y5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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% Y' R J+ Y8 X( \$ W; MQuestion:
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& V( K8 f2 b/ J- m+ {' J$ o公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
" a" {4 l& [' i( u" SOr just the weight of the water? 5.39.217.767 o: c6 D' Z: @( R% V& K# G
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Answer:
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It only needs to be designed to withstand the weight of the water! 0 H, A- t+ P3 k m
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
3 ? j# _$ |& }2 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。4 B o! ]/ _, y- d# c& _5 T
( J! b2 d" z! l5.39.217.76The Incredible Magdeburg Water Bridge in Germanytvb now,tvbnow,bttvb) a* F6 H L6 P/ w% X
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.
+ w8 G0 k2 K: ATVBNOW 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. 5.39.217.762 o" ^+ C% M+ R
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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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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。6 {1 g2 I5 z! i9 T' U
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