本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 公仔箱論壇0 b9 _# `( U. S/ @! r9 G1 f
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If you are not a Physics person, read on and learn a fact of physics.
/ \# ]9 \% p) e7 F( M( uAMAZING!
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Even after you see it, it is still hard to believe!公仔箱論壇4 _0 J- k t) H" I
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
5 p, e! X) u! `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) E+ [8 t4 r2 c1 [- r
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb& @1 Z1 H! i, z; p6 Q( c3 q# C O
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The photo was taken on the day of inauguration.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。/ Z# L* w% u( D& F! X/ A* y
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.tvb now,tvbnow,bttvb8 X% a; S7 H2 b, E7 k) Q
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 _* N9 ?! P8 `( n7 k
Question:
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# ^) D, l' ^2 f- V+ @0 u: [Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
) A" _/ z, [0 i- E公仔箱論壇Or just the weight of the water? 公仔箱論壇* g3 g4 b% F# [7 t2 f( A
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It only needs to be designed to withstand the weight of the water!
' h7 P1 |! K& P5 u8 J5 k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 loaded
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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。 s; i# i" p5 r2 U: c
The Incredible Magdeburg Water Bridge in Germany5.39.217.77:88984 g. O9 m% Y) z
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.5.39.217.77:8898" r# ~5 S& x9 q# @7 Z' M
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. ( v( g0 Q, B; s2 e0 l3 c# O1 i) f
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。! o( S2 g* D3 e* X9 h: x `7 ]
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.
5 _4 v# }* Q" {* y5 R. {& e0 X5.39.217.77:8898TVBNOW 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 E+ R. z8 Z) J
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