本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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6 A) D# M1 f# f8 r( U6 g# S+ f% Wtvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics. 8 C3 d) g- e$ {9 O
AMAZING!
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- c# v R9 z: D" b" G- J* m公仔箱論壇Even after you see it, it is still hard to believe!
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, C& ?/ M5 P# vtvb now,tvbnow,bttvbMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 0 D1 r7 n, Z& f# H
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
' F; t& J- Z0 }5.39.217.76It 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 W8 a; t% K6 B* Q6 Z
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.% [5 B3 V% U/ v; Q" i, X6 I' U
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Question:
0 e1 c% k) ?" U# 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。5.39.217.76 P' ~' b& T6 W* @. m1 D
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,公仔箱論壇% ?! K a; F; k% U( M8 U5 r
Or just the weight of the water? 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。9 p' E5 W W! ?9 y; P
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Answer:
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+ w# `( Y# l9 b% h3 AIt only needs to be designed to withstand the weight of the water!
/ p. ?; f' i' E, t6 Ftvb 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% M6 X* ^& y2 x
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4 {8 r/ L$ b' _7 DThe Incredible Magdeburg Water Bridge in Germany公仔箱論壇2 ?( M: A1 N) r& C) M
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.
- c. U# R4 d2 J" `1 [2 d; ftvb now,tvbnow,bttvbThe 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. tvb now,tvbnow,bttvb' v, h: ?" ?/ \5 ?0 W
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& N; f0 M8 `3 xtvb now,tvbnow,bttvbTVBNOW 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。% {+ k8 F" X( v
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