本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
5 B+ G2 W. ]( s1 VTVBNOW 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 m: J3 _4 ^. D4 p9 O; z公仔箱論壇If you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb4 x9 W" x+ G' ?" q# k H! ]6 Z
AMAZING! 5 r# b4 _. M3 q5 I }; A/ W! o
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Even after you see it, it is still hard to believe!5.39.217.769 S: C# J4 l. @7 ~& v$ u
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" j8 W+ p, `7 X0 ^. RTVBNOW 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! tvb now,tvbnow,bttvb3 m8 ]# N, s5 @" r
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
2 T3 G* C/ O$ l, Q7 [ DIt is located in the city of Magdeburg, near Berlin.
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) Z* e6 B8 F" W0 G5.39.217.76The photo was taken on the day of inauguration.
3 G w$ {/ N9 ytvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
' ^/ h3 E" L4 [ p% P* ?+ e' eTVBNOW 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 p @) A# ^; Q; R$ Z! F
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,/ M, I6 S+ C/ }; I- W4 g* o) _
Or just the weight of the water?
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Answer:; x6 }8 P2 o% u# O( d- W
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It only needs to be designed to withstand the weight of the water! 5 t4 {; p( i% n4 O2 T# H' |! t0 r
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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! J" }1 F: I6 L" a1 T b+ B0 PThe Incredible Magdeburg Water Bridge in Germany
* j# W6 r) i B- d5.39.217.76The 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.
$ {0 Y* |/ Q Q8 `2 O公仔箱論壇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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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。, I/ ?! r, X8 J+ I7 D B
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