本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 & _9 f$ a: W% c$ D
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If you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb3 g8 [0 A# M: z E! S, g* y
AMAZING! tvb now,tvbnow,bttvb3 A! O) j. e. b
( v' g |& r) H" N% l9 gtvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!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。% R: z) F9 ^ S* F" n9 M
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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+ R/ z( ]: K: x* T
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
" ]& D Q" n5 w3 C, G公仔箱論壇It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.公仔箱論壇/ o# P6 W" A% M* S/ k. M- i! m
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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。$ D c% N7 l3 N6 V' f. W
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Question:, ?7 h2 A+ z+ U4 |& M% a: |1 ~4 I, B
7 d% t! \) u, i& K) _* ?, 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。Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
r3 m. F9 r; H+ z& ^8 Itvb now,tvbnow,bttvbOr just the weight of the water?
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" V0 N% k: _0 X* \% P6 W; QAnswer:
3 k0 r) |/ ]+ J9 KTVBNOW 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。5.39.217.77 N o, \, A7 N6 `# ^
It only needs to be designed to withstand the weight of the water! $ e% l& M( k+ B/ p$ p& P7 m
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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3 m7 F4 o: \; } x* z" [7 \, w公仔箱論壇The Incredible Magdeburg Water Bridge in Germany7 C! @. ^5 C% 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.公仔箱論壇4 A$ k/ Y) K0 E5 C) y! X* K
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. 4 u$ o3 [% J: i C& B
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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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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。- a" C- f5 }6 ~1 v) O- [# X9 g% h2 K
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