本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 www2.tvboxnow.com0 {$ B9 s/ V# G7 m! O- V7 S6 Q
* D' h3 J( b9 a& a0 Owww2.tvboxnow.comIf you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb# w2 T% W, @% e; ~) x+ N+ {- S
AMAZING! * }3 f' r) w, P
0 y4 f/ n, t6 ~+ ?, i ?tvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!
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E& `! _" W* A; T$ xTVBNOW 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。tvb now,tvbnow,bttvb( l5 n5 @, E% m0 q
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! www2.tvboxnow.com: U7 R2 [, [: }" y5 e
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
% r" X/ X1 `" @2 c! FTVBNOW 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。It is located in the city of Magdeburg, near Berlin.
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+ h- b- H& v: D; ~ bThe photo was taken on the day of inauguration.www2.tvboxnow.com/ V1 w& q- v0 Q9 Z' f& P
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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7 B. W9 O! X2 h1 q7 |4 wtvb now,tvbnow,bttvbQuestion:www2.tvboxnow.com+ n7 s e- e7 u2 b. D) m) @% H5 C
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,+ t2 K2 ~7 `6 z/ C8 j, A4 y
Or just the weight of the water?
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' R1 `1 Z' w( s8 K CAnswer:+ j: [4 s: P% a' C( c, k3 ^
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It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb+ s3 h0 P) g) t
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* b5 w8 n4 W: R, A( F# b
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The Incredible Magdeburg Water Bridge in Germany公仔箱論壇* d; C6 a) x! C7 R: p) }3 j
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.
% S5 w+ R1 N1 b* bwww2.tvboxnow.comThe 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' w. ]# K) f, F- S6 M/ B; v$ V# atvb now,tvbnow,bttvbConstruction 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. - v9 J7 \4 _/ j8 t5 X
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