本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 2 C+ |0 Y/ q3 G* t1 [4 [2 G0 I
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If you are not a Physics person, read on and learn a fact of physics.
1 O; ]7 x* O# V. T8 O' stvb now,tvbnow,bttvbAMAZING! 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。' y/ U" ~3 }# V! O8 K
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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!
& l" n: x' R: {3 A0 {: ?; RThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 公仔箱論壇) h. o# w8 c% M$ ]
It is located in the city of Magdeburg, near Berlin.公仔箱論壇9 _0 ?9 ?, o% `) h9 q$ y
7 {& @5 ]/ @9 a: \/ z6 z. v0 p; MThe photo was taken on the day of inauguration.公仔箱論壇5 L! C6 A3 G+ u8 o3 S4 X
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.76: f" n; K1 K$ B& ]9 v/ C
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Question:. M! L5 ]% I7 f6 i
( j& z: {$ L& F% l4 YDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
- h- O! `2 |" @0 N3 M# a, 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。Or just the weight of the water?
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& \3 c5 a2 i6 k' ]; `% RTVBNOW 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。Answer:
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It only needs to be designed to withstand the weight of the water!
, S) N, H+ B. e* q/ f* ^tvb now,tvbnow,bttvbWhy? 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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9 @9 m, l9 @+ y! G4 h公仔箱論壇The Incredible Magdeburg Water Bridge in Germany5.39.217.768 }2 R- J4 a; r) q6 [, n
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.2 T! e2 _" P/ 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. % Y; W9 C2 F) I% {) ], U0 n$ Q
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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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( k$ s$ ^ t( u7 `9 pTVBNOW 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。 |
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