本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb$ v% M& y. F7 t1 o8 H% e1 h
6 L+ G" i" b6 A$ h$ s公仔箱論壇If you are not a Physics person, read on and learn a fact of physics. " a9 L9 @/ v# b7 t i1 M
AMAZING! 公仔箱論壇, i0 u. E0 Y5 g3 X. U- D) e
& p- n: V' {6 U6 k- c7 Atvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!$ {) y7 p8 e. u. d( @% p
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) E4 d; q5 h& L5 a3 GMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 1 z, r% n0 M) O' v
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 4 P) }( d3 p6 ]( a3 ^$ u9 ]6 f
It is located in the city of Magdeburg, near Berlin.公仔箱論壇4 W+ N% _; F+ R9 o4 ]! E0 e
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。" u! Y' S* W8 i+ g' S, \
The photo was taken on the day of inauguration.
3 W! e$ Q7 q; S6 g9 `To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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1 V. @# d+ T" _8 ]9 m& iTVBNOW 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。Question:
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. g# p U+ ]% \/ ?$ \ {) mtvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,7 I6 A0 \( M$ z) [/ Q* K$ r4 U
Or just the weight of the water? . D9 X0 R1 \- @# e }; u
* h9 v9 X) I1 v, TAnswer: L1 G; I( R' i A
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It only needs to be designed to withstand the weight of the water! 公仔箱論壇! f- b1 m2 `# u
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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The Incredible Magdeburg Water Bridge in Germany
* X8 q7 E4 |$ m( R9 Ptvb now,tvbnow,bttvbThe 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.
4 ]: D% g1 n+ f2 K, zTVBNOW 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. 公仔箱論壇0 t3 [- M4 M) O6 j. a
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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. 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。9 w5 E! h9 J1 f$ d
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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。 o$ U9 M6 A7 ~& { I! @+ E
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