本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 公仔箱論壇 e' D( {8 u$ O+ ^; ?
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If you are not a Physics person, read on and learn a fact of physics. 5.39.217.77:8898; s. Y4 _3 S; O5 X; \3 ?/ \7 S U
AMAZING!
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+ w$ s; R$ j+ cEven after you see it, it is still hard to believe!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。! R& A7 p5 {2 O0 y
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
. e4 S& n7 T, o6 ~7 ~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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5.39.217.77:8898# o! I D1 q; w6 h6 f8 S- [; K! f
It is located in the city of Magdeburg, near Berlin.
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6 ~0 y# ?/ d. X, @: Y! \公仔箱論壇The photo was taken on the day of inauguration.
$ {3 B# }! a" ~7 f' D9 r8 Y% 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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.tvb now,tvbnow,bttvb2 n, B/ j) L7 S. F
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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,
) b7 e* v* f" l* Dtvb now,tvbnow,bttvbOr just the weight of the water? tvb now,tvbnow,bttvb* A; k; I. F0 A9 H& I! K% ?! D
+ V6 K, H q& ]- o4 u1 EAnswer:& |$ \+ S+ k; b0 V8 s! ?
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It only needs to be designed to withstand the weight of the water! 公仔箱論壇; F* D" Y6 o m; ^1 o
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公仔箱論壇3 w; m$ S0 |9 L$ V- I
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% r% F& O) ]2 ftvb now,tvbnow,bttvbThe Incredible Magdeburg Water Bridge in Germany公仔箱論壇& N5 C" }8 }8 D* a
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.公仔箱論壇$ |1 Q* K2 l- [5 S
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. 8 G. ` H6 p. O3 o9 ]: c O
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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. 公仔箱論壇+ K: N$ J7 D+ ?
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