本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb* K. q4 `7 o& D5 x. x, H
1 X, K' a L# X2 u" I公仔箱論壇If you are not a Physics person, read on and learn a fact of physics. 3 T. c7 X6 M, w
AMAZING! 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+ I! b; s# {& R4 Y
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Even after you see it, it is still hard to believe!/ l# z" a3 w( V" i/ Z Q
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
! Q" l! R+ A6 e8 @" Q1 y4 \" e公仔箱論壇This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. % Q! N0 z! D3 H2 `$ o; m
It is located in the city of Magdeburg, near Berlin.
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0 w7 A7 G+ Q8 D9 Q8 |3 h* 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。The photo was taken on the day of inauguration.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。' {5 X/ n7 o. C& M y$ ~3 ]
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:公仔箱論壇: h! c) i, ]- T% J3 B8 |6 `
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 i7 c, o9 `( ?0 k5 s3 X
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
b3 o3 s& e& s9 G( i. |tvb now,tvbnow,bttvbOr just the weight of the water? 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。3 q) z3 ^; g: X2 D, D9 L
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Answer:
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It only needs to be designed to withstand the weight of the water!
+ a6 V' y6 e0 y; w* 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。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# j1 i C9 h2 i" _9 \/ P3 |
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The Incredible Magdeburg Water Bridge in Germany% ^6 B( S( `# r9 Q# S+ t
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。$ O7 @# D1 _. L/ L9 R
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. tvb now,tvbnow,bttvb- V, M' b; o9 g H; V+ i8 P8 p5 y
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。; @( S3 e/ ]; y' Z* U! m
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. S# a: h! D, A" v9 c; D% I$ Ftvb now,tvbnow,bttvbTVBNOW 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% o! T1 F# Z
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