本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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. w& w K( x# K: wIf you are not a Physics person, read on and learn a fact of physics.
! N# r& \; e+ AAMAZING! 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。- e. |# t3 y; t1 A0 {
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。7 b: Y7 p! Q5 ~0 m. A
Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb$ v# E* T* }( S+ d9 V4 H( l
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! ' V* k! K! _/ n l! B# D' a/ w) |
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,bttvb4 }; E5 u7 e* r0 J! j% ~; R
It is located in the city of Magdeburg, near Berlin.
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0 `8 Y& I% g& t3 Q* 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。The photo was taken on the day of inauguration.公仔箱論壇4 \- f9 y2 i4 m% y3 A
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.& y0 r3 d7 | d
% o' V, i. C* e; c& |* btvb now,tvbnow,bttvbQuestion:
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1 A; E# |: G! ]: ~* t1 u: y2 S2 F. a公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
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Answer:公仔箱論壇% H0 i* W& Z/ h, [" o
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It only needs to be designed to withstand the weight of the water! 公仔箱論壇+ D5 D' O8 k9 h
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
4 H: t' D9 S% K公仔箱論壇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。# l: B9 w# o1 f2 ~- m5 ^
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The Incredible Magdeburg Water Bridge in Germany
/ y: C; L! g( x% X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., Y1 T; E! w. I: ^2 I
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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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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