本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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. P% j+ t3 `9 h4 X4 Q: M/ f! l' \# TTVBNOW 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。If you are not a Physics person, read on and learn a fact of physics. 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- m0 R* X# {6 N9 O, ~% ]$ j
AMAZING!
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Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
4 k$ N! T, a% ~4 l5.39.217.76This 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,bttvb6 S- u3 p. G% |! D, ?/ K$ {0 ^
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb, O+ @- 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。, P) l# ^: u, H4 y! l6 |( A
The photo was taken on the day of inauguration.! T' f0 B/ R/ ]; X
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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3 w; \2 q5 n( {( J' JTVBNOW 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。Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,$ N( {$ _$ {) Q, a/ H
Or just the weight of the water? 0 R' D: M9 U; l/ E
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) E. G3 q9 p5 s1 L公仔箱論壇It only needs to be designed to withstand the weight of the water! 5.39.217.765 o& ]& X) b: p/ y2 h
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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The Incredible Magdeburg Water Bridge in Germany
) y# ]" D- j8 X5 v/ o公仔箱論壇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.: s, v+ l: a# a( i* ~ U$ 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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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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