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.
+ j, v8 n! e; ntvb now,tvbnow,bttvbAMAZING!
* Z. D# C" o$ H% g& I0 `$ h& m/ m5.39.217.77:8898公仔箱論壇$ v0 E! s7 M. _( w
Even after you see it, it is still hard to believe!: w( m9 r L3 z1 B9 x: J- h
+ {) U% w$ A% s8 U' u公仔箱論壇
. S; a1 c; }: b# J- zTVBNOW 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。Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
" s6 w' }& V$ m/ xTVBNOW 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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5.39.217.77:88986 a# A [0 _ U! o7 ]9 k
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb, k- B! Z3 O. ]& M3 p
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The photo was taken on the day of inauguration.( L4 {+ d3 V" m8 G( z1 p8 H
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:公仔箱論壇0 H9 L% C) b2 y1 ^. o: m
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
4 p# @7 K& `# t( b5 x. N7 zTVBNOW 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。Or just the weight of the water?
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; T0 p, _7 M, a2 Wtvb now,tvbnow,bttvbAnswer:5.39.217.77:8898% r/ i, m( @& N
9 D. I0 N: } {( _4 z% g/ L4 }tvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of the water!
' b5 z8 [" J; a. r7 K) j( D公仔箱論壇Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded4 ]- N6 d1 L/ N2 i
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! X* Z9 C$ w( S1 u5 f8 u; VThe Incredible Magdeburg Water Bridge in Germany
7 r# i$ o$ l' N& b7 cThe 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.
6 y, \' e; z0 r" ]; D& o2 ?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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' h0 j" g( F5 b7 @5 G& dConstruction 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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1 r7 q/ q+ t" P公仔箱論壇9 R0 [ ~3 c9 ?
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9 a5 R/ C5 v& I/ }6 }公仔箱論壇, N3 O0 J# K" v. W, L# {4 U
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