本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇1 \3 Z9 a* ^3 i- S" I1 y& c0 a) Q/ ?
AMAZING!
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Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb! W! Y- j0 D v( y
! P) f$ W# u) _; q, [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。
9 O5 v. s2 k0 z, k" q1 f2 qtvb now,tvbnow,bttvbMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇" A! [4 t* ~. @6 l) B. f# }
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
: V$ c4 t1 h4 e! L% k公仔箱論壇It is located in the city of Magdeburg, near Berlin.
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. u& D. ~1 o& f. G* i; ?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。The photo was taken on the day of inauguration.
* e: q! p* R" A3 `1 ?$ c5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
4 S( U: J: t+ f, w4 r* q. BOr just the weight of the water? ' W" c9 ?- V, I2 F6 }( i, l. L
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Answer:5.39.217.763 R. L. _& r+ _4 R: a6 h z5 ^
4 j% d# l2 w: a8 t ~公仔箱論壇It only needs to be designed to withstand the weight of the water!
% u) {* T7 Z( t) ?5 M" j cWhy? 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 _, W: A7 B3 `/ A7 [9 S4 Z8 t9 Ttvb now,tvbnow,bttvbThe Incredible Magdeburg Water Bridge in Germany
" Z' A4 x. M6 e9 `6 F7 p8 U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.
" H" x, c5 ?% f/ o8 _) S5 \5.39.217.76The 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.
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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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+ G& |/ H' G9 @8 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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