本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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1 d5 I: K. }( i# ZIf you are not a Physics person, read on and learn a fact of physics. 5.39.217.77:88986 t8 N$ T! N1 q1 ~
AMAZING! . B, l( P& q( h0 y
6 h) g- r) ~. W- f5.39.217.77:8898Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb7 ^0 B, j i. k/ V1 [6 `7 U
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3 ]8 J* k' @8 D" N/ y e$ {: w9 |5.39.217.77:8898Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
+ e* J& K& `0 r D" Z0 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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
1 k- ]( t+ m3 O; A. _5 r5.39.217.77:8898It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
8 B0 q* d, m# e* X5 B7 Z: `To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists." [- P' q) n7 C- d: e
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Question:tvb now,tvbnow,bttvb6 X, n( u- ?8 n: [% N0 } q3 a
2 a4 _& z! u: J* e公仔箱論壇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。3 O5 Y6 |% I: w1 ~' V
Or just the weight of the water? tvb now,tvbnow,bttvb0 g+ t( r6 n1 F7 _' q+ |7 T
8 N. H# z9 } 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。Answer:
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It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb, W& @4 P0 M5 B: Q$ G5 F+ k
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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The Incredible Magdeburg Water Bridge in Germany j" P u( A4 I- Z6 n Q/ W
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.
3 G8 w; ?. [" O- vThe 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. 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 D: S# Y, R- G! z# H2 G
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