本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
~7 `0 n' x' v; V7 k W/ c- e公仔箱論壇
& ], [6 L5 t: E/ i6 P( r, N9 [tvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.
4 q, j7 C! p5 Z2 y) M7 |! k2 HAMAZING!
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Even after you see it, it is still hard to believe!公仔箱論壇, `) [ a) b& g: }, P9 ~
5 {4 S! n$ |1 Q( S! xTVBNOW 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。0 o3 D7 E; _, f' r1 J2 _- R$ z
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
s8 P4 i0 c- m' R5.39.217.77:8898This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5.39.217.77:8898; E! h z. Y3 v1 e5 G3 }
It is located in the city of Magdeburg, near Berlin.公仔箱論壇5 J1 o, }% d; t# J% F
0 Q7 {% P# @6 S' A L& N! hTVBNOW 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.* J/ N3 o8 X8 }
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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" i! \+ u# l3 g5.39.217.77:8898Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,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。% u. n# i6 g0 W4 k1 x* v1 m# w
Or just the weight of the water?
5 ]7 ^( j$ L/ y* W! B+ ~$ 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。
" `5 Q4 w4 f# r5 S+ b公仔箱論壇Answer:
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* D* S& J5 i) V- g/ q1 e5.39.217.77:8898It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb, K6 B, Q2 B2 m% X' S( l4 e
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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5 r* G. c7 u5 i+ J c, oThe Incredible Magdeburg Water Bridge in Germany
- a4 N J" D: {) B: A* P. STVBNOW 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。: c! H6 P9 {. Z0 i, C9 s8 h3 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. 8 Y5 w! I, o3 z
3 K3 V3 t) P! CConstruction 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。7 j9 V$ g8 p) S* M+ c, R! M
7 e Q5 E: @2 }( ]/ W9 L; O+ m: f) qTVBNOW 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。5.39.217.77:8898- [4 [- {7 G9 n6 _
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