本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb2 }% \- I8 o( D0 o
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。0 p3 S) x' C: [9 Q1 A
If you are not a Physics person, read on and learn a fact of physics.
+ A0 j% D* y: S/ p! @6 D( h: Q) ztvb now,tvbnow,bttvbAMAZING! 5.39.217.76! B% B3 o( {7 e! O
+ |" f: j6 r1 u: j0 Q3 m; T3 f( y- [公仔箱論壇Even after you see it, it is still hard to believe!, D2 a/ O0 q7 a* q, f" |6 I0 E
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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,bttvb9 A# ]1 N/ s/ ]( ^& L) e; u
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
4 O+ A' M6 A% \* P# c; {5.39.217.76It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb8 N' {: m5 [: y2 `# H# @
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.$ e( R0 `1 x7 N) Y6 ?$ i& }
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。; k* H6 C+ E- k( d
Question:
7 O2 Z) R! o; n# g0 p f! i. |: i5 gTVBNOW 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。$ X0 c; W- ~0 n5 }* w- L
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.76' D5 I" p& m& F7 k2 X# I- k
Or just the weight of the water? ' w1 ~0 Z" n9 w. H: r
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Answer:& X: c9 g* o0 m
1 ~" |0 m6 ~4 N公仔箱論壇It only needs to be designed to withstand the weight of the water!
$ b5 V: m! Y. J, j6 O公仔箱論壇Why? 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,bttvb4 I! J0 g/ y0 T# X
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The Incredible Magdeburg Water Bridge in Germany
2 Z+ R ^3 V0 o4 V7 a% oTVBNOW 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 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.
* J& B8 J1 B( ~1 i% i: Btvb now,tvbnow,bttvbThe 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. & g, }9 R7 R& d
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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. $ i$ C) [5 ~" A& U4 ~, E
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