本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.76* }- P: F+ x8 A" {( t* N5 {5 R
$ S1 X/ b3 l6 c7 M& T, L公仔箱論壇If you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇5 O5 I5 d6 r* Q6 [ w
AMAZING!
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Even after you see it, it is still hard to believe!
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) S! V3 n3 S, \% g% RTVBNOW 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。Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
9 Z9 ]! {7 B, C2 u: ^7 ^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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5.39.217.764 F# o" M6 z+ i3 f
It is located in the city of Magdeburg, near Berlin.7 V1 w8 W. i0 S: I4 n [
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The photo was taken on the day of inauguration.2 A- A# ]" g+ z# s H1 z) s1 W& g
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇4 I' P4 I& G, x5 O# J. x
# l0 A5 F, E- ]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。Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,. L! i! ]- ]4 k0 x( G* L+ E- y
Or just the weight of the water?
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) A8 B1 g" ?: ~$ j8 F' n. {4 ^+ {6 RAnswer:
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' M1 N( ?! M9 |( b6 @' GIt only needs to be designed to withstand the weight of the water! 5.39.217.767 h* J# h4 j8 X# }3 |/ J
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
6 c# u) Y2 r! i% T% E# N# tTVBNOW 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.
0 ]0 |/ c. U* r. @' N( D/ G5.39.217.76The 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. 5.39.217.76 V6 @4 v4 i! \, z% X
3 ~& w7 k) x9 C/ _1 X5.39.217.76Construction 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. 公仔箱論壇6 Y) Q( O2 [2 ^' L- P M
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