本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics.
' a% t' W/ @8 E' E1 ~0 L1 v# }: ltvb now,tvbnow,bttvbAMAZING!
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9 z0 J; J5 q* K, y8 J$ G1 R* `Even after you see it, it is still hard to believe!$ G% |9 E; M7 S5 P
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7 f/ k/ c, F2 U0 M! w2 F! I7 Y. aTVBNOW 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。Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 8 U, }, i: |. g0 o
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
5 i4 q- g) |! j2 \4 }公仔箱論壇It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
, l( O7 v( |$ t1 ^2 G ZTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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* `' X: _& i3 n: U- R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,
* X% c9 o. ?, w( ]+ `( k6 P* {tvb now,tvbnow,bttvbOr just the weight of the water? tvb now,tvbnow,bttvb8 l0 Y) ^6 z6 f& Y5 M* X
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Answer:9 p W1 O+ W4 o$ x3 h: }0 }
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It only needs to be designed to withstand the weight of the water! A e" L+ A* H! I9 n# S' V
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+ r( m; R# S. L% [& O$ c- Z/ F
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The Incredible Magdeburg Water Bridge in Germany
, }4 _4 C& Q' Z1 B" Z0 }$ b: u$ M2 h2 B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.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 X7 B ~0 x7 f& E7 Z1 |( _" P* u- u
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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# w3 {; ~/ Q7 [) k; oTVBNOW 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。/ j/ n& i, |/ Z5 Y$ U
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$ Q" Y) e8 W& x' o! }6 R. I" Y) a7 |公仔箱論壇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 z. O3 k- w+ p- K3 g
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