本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 2 a5 u9 |$ T( [' o+ Y: Y9 Z& S. P
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If you are not a Physics person, read on and learn a fact of physics.
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% z/ `3 P" p5 _Even after you see it, it is still hard to believe!5.39.217.77:8898# p1 _ g- l5 G. F
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇) l3 N- R* j0 o V# e- b( w! S
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 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。' I7 A9 u. Z+ I
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.5.39.217.77:88987 ^8 \$ |4 I, `- s8 W4 k6 g
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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/ g; X1 x+ U( f# ?9 RQuestion:9 R8 z" @$ F: E' D: D
& c7 {( |* T& ?4 Y) C8 \4 }Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.77:88985 O* Y. F, S s, x9 U
Or just the weight of the water? 5.39.217.77:88981 H; }$ i; f% s1 m, d
5 H) w) T& m$ R6 q: {* [( Q$ ^公仔箱論壇Answer:
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3 c* T( @! U o( M! g) }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。It only needs to be designed to withstand the weight of the water!
* D" {0 N" c+ J$ F( T M; }$ a8 mWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
: w7 A! y, G1 j0 fTVBNOW 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。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。4 J% u2 _5 V; a6 Z' G
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The Incredible Magdeburg Water Bridge in GermanyTVBNOW 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。$ h S4 M' _4 A, K) O8 O9 g" ^
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.
8 Q9 n& h0 ~! o5 D8 DThe 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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; V( y/ w2 X, l2 f3 {0 [tvb now,tvbnow,bttvbConstruction 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. 5.39.217.77:88987 Q" O8 a& _) D, b8 b# H4 Y
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