本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb9 i( ~9 I2 N r' {" r0 v7 }# J
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If you are not a Physics person, read on and learn a fact of physics.
4 h- `. f* ]8 s5 X0 _# ?5.39.217.76AMAZING! 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 Q2 C7 g3 N' \( E, T( {' p
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Even after you see it, it is still hard to believe!
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/ p: Q! O+ h8 N. 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。公仔箱論壇% x7 M" I ]3 L" V! k
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
) x' w8 y0 k) dTVBNOW 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. 公仔箱論壇. D" G* m w2 F2 Q! w
It is located in the city of Magdeburg, near Berlin.
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, d! u9 w, A0 y+ X; 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。The photo was taken on the day of inauguration.
# L* _; a& z. }) v$ Q5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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2 G4 ?) H6 @0 T2 i' t% U/ F公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
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Answer:
9 x. p- Q1 \2 v2 f5 i7 a# c9 s g& Wtvb now,tvbnow,bttvb
# T C1 |& f4 r: q" O5.39.217.76It only needs to be designed to withstand the weight of the water!
# Y; o6 t) |* j2 C, n" T' S0 b. N公仔箱論壇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" {- ?4 z5 P8 K2 F& ^& [4 v$ j
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The Incredible Magdeburg Water Bridge in Germany
6 c, s# S/ O7 L- |/ h8 \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, L3 o5 ^7 g( {# M5 v& w+ ^ W+ m9 X
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.
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! ?( R3 c% h! i6 {( g, EConstruction 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! Q: B% ~9 Q5 X8 H
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