本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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/ @( s5 _3 ]" n. ~* wIf you are not a Physics person, read on and learn a fact of physics. " W2 `" m B/ v' L8 t$ j8 N& @
AMAZING!
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. m# x+ t* Q$ u3 H# p0 K) dEven after you see it, it is still hard to believe!公仔箱論壇8 r" J" c7 ^+ }& j
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
0 T& Q& Y7 ]. z" N. _0 C% C公仔箱論壇This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
3 c4 ~% o) @1 r0 v5.39.217.76It is located in the city of Magdeburg, near Berlin.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。$ h# M5 `# T) R+ p0 D4 n
) C$ k; k- u0 ?: lThe photo was taken on the day of inauguration.
' f5 c$ ~; B( m x/ A/ f5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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/ p" O9 e2 X# a$ _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,
! ^3 l" Z b8 j& l9 |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。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。' ^& X ?' |- J% W/ m
7 C8 }3 |7 P4 p$ G6 H5.39.217.76Answer:
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It only needs to be designed to withstand the weight of the water!
: T* K9 p0 q L. [% Y* Dtvb 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
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' {2 a9 k4 v& E/ x0 N5 O公仔箱論壇The Incredible Magdeburg Water Bridge in Germany
5 S! u! R: V& g9 t公仔箱論壇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.
, C1 H7 b l$ d% E& atvb 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. 7 a0 z* R" }: W3 C1 K. M% t
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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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9 A t" L+ l/ T$ q& z. ] S! a! }: r; 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。 |
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