本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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3 `3 h) R+ D- t( 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。If you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb2 h- n1 f2 w' f- X/ w
AMAZING! 8 X/ x" A2 P. I
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Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
) O8 ]4 ^# J/ g9 h: _2 kThis 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,bttvb* @# x/ n) U! ?4 |/ X* a
It is located in the city of Magdeburg, near Berlin.
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1 t& M: {4 |. M- i5 F6 Y0 P公仔箱論壇The photo was taken on the day of inauguration.! I1 V. m. w9 F9 O' u z
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.' s' L a* f- b% h n- }
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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,
1 R5 H3 u( O. L# a/ _& ^5.39.217.76Or just the weight of the water?
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S$ {! K# S2 ]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。Answer:
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8 @3 d5 A4 v4 K' C& _9 W0 `公仔箱論壇It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb0 o* u; g, H$ a e/ X( j7 `
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedtvb now,tvbnow,bttvb1 C: ?+ M$ g$ M, \* Z# z
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The Incredible Magdeburg Water Bridge in Germany公仔箱論壇; ?' N6 i8 i) R; W
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% a
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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( c; t$ B5 n2 B3 m8 r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. 4 j! q& |+ r" u4 S; s
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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。& g' u* o8 T6 ~0 x. Y
' @) D G% B$ c& r8 W v# jTVBNOW 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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0 B* F+ v+ s6 h4 Btvb now,tvbnow,bttvb公仔箱論壇1 A0 e3 ?' h) ]9 V; S; E
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