本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 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 s( G) _' U! |
( n d* C+ D* E' M5.39.217.76If you are not a Physics person, read on and learn a fact of physics.
6 `6 v( B3 ?* STVBNOW 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。AMAZING! 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。2 Y# d* l1 k5 Z! Z4 H
; g" A0 I8 P. I& JEven after you see it, it is still hard to believe!
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2 m' @0 J2 ^/ ~$ aMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
9 c C2 m! x; [6 F* _This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. & h- \' s2 m/ r
It is located in the city of Magdeburg, near Berlin.
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" S0 J9 I& }7 I2 I7 H7 m: ]The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb& d1 h8 ]5 K/ V( X$ d8 M( m: F
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇3 R1 g% @& b) }8 U% T, W1 [- z
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Question:
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# S8 o+ B2 X# U. a) Q- a, p5 A5.39.217.76Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
v6 r" K$ G [* j$ ~公仔箱論壇Or just the weight of the water?
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$ D# @% {+ _# Z$ X/ T公仔箱論壇Answer:
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It only needs to be designed to withstand the weight of the water! ; Q3 a9 S6 ]+ ~0 ~& M7 G* p) n
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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& y1 N. V8 b7 u- m! ~The Incredible Magdeburg Water Bridge in Germany- o) p% X5 |% e1 V4 m6 e) D
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.8 C! `3 u& ~; s0 X9 }
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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/ {, O- u6 {9 x4 G3 F! P& }) AConstruction 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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) u8 d" M# u8 x. z公仔箱論壇
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