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. 5.39.217.77:88983 O- Q0 l X) ~ [1 c# _
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Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
1 ` J X; ^# k- w; J+ 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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
5 ?; v& m9 Y" F4 k4 f/ \It is located in the city of Magdeburg, near Berlin.' i1 F' ~( |4 V# J! a3 b5 T
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The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb: i& w+ s% t. X7 T; b
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇5 P/ | k) ~9 c* I6 b* ~* d3 B k# G
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Question:' q0 S( P* ~3 [, ]( I! u: q# e
9 H, E) u" j& N3 K6 u4 n% ODid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
7 ?; E" d, }( R; U, e jtvb now,tvbnow,bttvbOr just the weight of the water?
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3 l& n+ c/ T T( k5.39.217.77:8898Answer:tvb now,tvbnow,bttvb- g/ c* k( J9 v+ s( q& I
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It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb; j8 S6 V% w! ]6 y; c" Z5 j
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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/ X# x0 c0 D1 x9 S: {1 s" LTVBNOW 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。
) R* P& V" e: N$ a9 b2 m# \# Z$ ^The Incredible Magdeburg Water Bridge in Germany
% W' V, m' R) C, ?0 z% r( F1 uTVBNOW 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.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。1 ?, K% W7 y+ [. V
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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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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