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8 v! ]: d- C5 X! U
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。. h5 r& b* r# o g# f; _8 e0 M
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Even after you see it, it is still hard to believe!( S: V6 p" n1 @2 l% b( g
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
- x# z9 i; ~/ PThis 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& D! [( W' l. t. |' `
It is located in the city of Magdeburg, near Berlin.
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. [& c1 Z6 q+ QThe photo was taken on the day of inauguration.5.39.217.76; e" Z3 r# E% L, [( H" y
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.* _3 {+ A! j2 j, V
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Question:
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) F8 Q0 u9 r' a7 F. v4 R' O5.39.217.76Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
4 S% z2 Q/ K) e6 z& i8 H公仔箱論壇Or just the weight of the water?
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( L# S5 Y! V9 d5.39.217.76Answer: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。- `$ H, N, \& L5 X: r3 @
! L0 R3 \& o' FIt only needs to be designed to withstand the weight of the water!
; e& Z# P p: Q$ s3 \4 L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 loadedTVBNOW 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。; W0 r; @; l7 Z3 G( {# W/ M
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7 u3 ~9 M4 ?$ V6 ^5.39.217.76The Incredible Magdeburg Water Bridge in Germany
$ ~& N; G4 Y" X, h3 i2 TThe 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.
9 L; Y t$ E" rThe 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. 公仔箱論壇$ G, b, {$ U; b5 Y" g
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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. " L5 Y, h: n5 J3 f z L
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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。7 e! n# N5 n0 ?& a7 E, ]$ I
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1 W% |; F$ q6 ]- C4 l5 Xtvb now,tvbnow,bttvb5.39.217.76* a) P+ s# C: q* ~% F* C
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