本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.766 a9 H$ g3 }" F( E4 u$ |7 H& r
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If you are not a Physics person, read on and learn a fact of physics. + G" J+ I" A3 y$ R* w' l& S
AMAZING!
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Even after you see it, it is still hard to believe!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。" n; m* C- ?1 A- X2 G; \: ]
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇% L% f3 E/ i4 |; o, E) m G
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. tvb now,tvbnow,bttvb8 b$ G1 W! y. p4 ~, O( ^ w- Q% a) F
It is located in the city of Magdeburg, near Berlin.
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/ j: W2 s1 r9 L- `, X/ y" W/ itvb now,tvbnow,bttvbThe photo was taken on the day of inauguration.
. ~, ~. C6 h6 U0 pTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
7 }% X1 c" u" |4 ~8 p8 OOr just the weight of the water?
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Answer:5.39.217.767 }4 W4 h, o2 d+ Q; @
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It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb s% T* m) K' L
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
% M4 u" T- \& J' D! x! s( N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.
% @+ ^# u& `* \6 A: Q! ~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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# l8 |8 ^; m2 M; h3 B0 m公仔箱論壇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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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。 j8 r+ P5 {; T
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