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.
. M, W/ x o3 T- btvb now,tvbnow,bttvbAMAZING!
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Even after you see it, it is still hard to believe!
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3 ]- w1 i- x$ `1 U公仔箱論壇Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5.39.217.76) X7 X7 b& w& R l8 b
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 i/ |8 ^; W+ Q
It is located in the city of Magdeburg, near Berlin.公仔箱論壇0 b& [; t$ S" \6 d& v& u
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。# d$ K5 w0 Q4 _( S5 O
The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb2 J! }& Y0 b/ D% V& N
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇* P$ M& U# c+ Y! ~: V1 Y& Y
1 M- S2 L: H8 i ]Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.76- c* f% w5 R j7 b
Or just the weight of the water? 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。 H+ t1 G2 ^, d8 }+ _" Y P
! X" E% y! D% t6 l. k+ s9 bAnswer:7 [* I: B' A8 d/ A# ~* T( E/ a
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It only needs to be designed to withstand the weight of the water!
! u1 Z7 V4 f# P. [8 F) 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
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4 b6 C1 ]3 V" G2 r* G- CThe Incredible Magdeburg Water Bridge in Germany
6 |, t) R/ e7 A: M) uThe 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.公仔箱論壇6 | l. W4 w- o* v1 @2 Z4 b
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. ' T& ~9 b9 `) G$ O0 Z/ w
; c, G% K% p% @5 stvb 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.
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