本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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M8 f$ k/ U* X; p4 e3 e( p+ WTVBNOW 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。If you are not a Physics person, read on and learn a fact of physics.
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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! . a% C+ j: G- e' ^9 w7 t: D
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. ) D8 Q9 {2 x+ m% j7 ~
It is located in the city of Magdeburg, near Berlin.
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. ^+ N6 s/ Q3 o: X; r/ LThe photo was taken on the day of inauguration.5.39.217.76$ l- y8 @1 c' s5 |3 ~5 w' { D4 I* ^
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.tvb now,tvbnow,bttvb# n+ w5 G2 H7 Z4 V
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。4 A8 j5 r; h' k* a7 b! `2 R, M
Question:5.39.217.76* n4 n5 q4 F; z4 j* F! N
$ ~% U: w G6 z( w6 nDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
; `5 z E$ H1 p! e7 M+ B4 zTVBNOW 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? tvb now,tvbnow,bttvb$ E# j& n" o7 A( m' W
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Answer:
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5 r; a, A8 R* zIt only needs to be designed to withstand the weight of the water! - G( b0 W; u& F
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公仔箱論壇3 X, p' T6 B2 u9 s" F, b
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The Incredible Magdeburg Water Bridge in Germany! K* f1 @& n5 {+ G! r
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., i) P! N$ K6 ~8 ?* {. T% F. 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. tvb now,tvbnow,bttvb: y# E Y: [! d
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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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tvb now,tvbnow,bttvb/ k. {) U3 P3 b" y; |2 [( f
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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。% G1 ~1 Z6 P2 `. o$ h
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