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.
. A p2 O8 e5 L$ xtvb now,tvbnow,bttvbAMAZING!
# t) S- {0 m6 a$ H4 A# yTVBNOW 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。# N% i$ v# I5 Z: l& F
Even after you see it, it is still hard to believe!$ H, k+ i2 S/ _1 T( {/ 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! tvb now,tvbnow,bttvb( ?2 w0 M8 a( v' D2 ]1 q+ t
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
0 H( L1 ^" |5 M- Z" u. P2 R5.39.217.76It is located in the city of Magdeburg, near Berlin.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。+ M) b. ]8 S% a# k' z
2 s* e, X7 J9 ] O I0 }The photo was taken on the day of inauguration.- H# L+ Y- g/ l7 O {: T( K& r3 f
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.3 V$ T8 m. T0 c$ y+ s, K5 X7 `5 |
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Question:
+ U3 H; Y% u* z% K! o* m, l) nTVBNOW 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# K2 y' [- ]7 bDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb* ~1 {$ M: z. A; x
Or just the weight of the water?
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Answer:
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It only needs to be designed to withstand the weight of the water!
6 [+ } t/ G0 o0 x! CTVBNOW 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。Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded6 h0 [" Z& @2 Q& x. P+ n
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The Incredible Magdeburg Water Bridge in Germany: n5 V8 C2 ?" R7 `
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.7 i# }. e9 E# y
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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+ Q: l5 Q! {& TTVBNOW 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。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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