本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 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。' o6 a; Z. N5 x2 T6 D2 Z( ~
+ `7 X3 D; _3 c: M& Btvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.
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$ I2 v1 G9 e3 Y8 b4 U5.39.217.76Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb& Q e/ g- r6 l S: c6 R z
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇9 f7 N/ R4 _( ~4 n
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 公仔箱論壇6 b! t: {# X5 Z& ?
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb# b5 p7 ]' e4 A
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The photo was taken on the day of inauguration.
6 k K2 s" V, ]! o# d& M6 sTVBNOW 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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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; z. \5 D1 `* j9 l: x- {tvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.76* p1 I! |( a7 h
Or just the weight of the water? 公仔箱論壇. q( c* ?8 N$ n% V
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Answer:
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" z+ ^. r. Y' d6 C# h5.39.217.76It only needs to be designed to withstand the weight of the water!
" Y: o N+ x5 w$ Q4 g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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3 V# F! w7 y. L7 u! Q' e; |The Incredible Magdeburg Water Bridge in Germanytvb now,tvbnow,bttvb5 N4 z7 s' m+ t% A+ I
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.* E- Q4 P, S+ J7 O0 ?' G
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. tvb now,tvbnow,bttvb" g# G; ?0 G P) J5 i4 @2 M, s9 Y7 v
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! U6 Q6 `) D4 x7 X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。8 R6 j& Z& y- x% L5 G/ g( g0 j
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