本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 ; a) Z6 D! x; g
5 E% ] v: Q9 a6 x5 ^5 ` z dIf you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb3 l7 k0 ^+ O, e! F
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4 `4 ?' M1 ^0 H+ u" T# r* k公仔箱論壇Even after you see it, it is still hard to believe!公仔箱論壇% Z4 J0 a8 Q9 [& n1 s) R0 S; S
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇. O: s, O" P6 X/ Z9 W2 O
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
3 U/ @- |$ j; s0 [: o2 [+ ^/ z0 oIt is located in the city of Magdeburg, near Berlin.公仔箱論壇+ v( Q7 F5 _- P* K5 t
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。9 o0 R$ C( w+ u5 }
The photo was taken on the day of inauguration.
g. A1 ?7 |9 M& o7 hTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇" O" m4 r# M1 O( e# a
; B" e7 ~% g Y9 S8 M Q+ [& c公仔箱論壇Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,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 p' J8 g5 Q; A$ c" d$ C0 l4 H* p; Z
Or just the weight of the water?
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It only needs to be designed to withstand the weight of the water! 公仔箱論壇$ c$ K$ F/ |1 A2 ~5 D; g
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 [+ {3 S6 v, F! O6 A# ^
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The Incredible Magdeburg Water Bridge in Germany
! C+ Y1 S" c& g, k' g- KThe 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.tvb now,tvbnow,bttvb' l+ M f. v3 b) t8 F" c0 W- F' ^
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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' J# M2 g) `: {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。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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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。! k6 O5 R- v$ i5 O, i z
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