本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb1 a- e3 N2 n1 c' P, @
' |- `& F1 Y+ C* Y5 G) t4 a& ~9 H& g5.39.217.76If you are not a Physics person, read on and learn a fact of physics.
$ @2 n7 a7 J$ ^/ C0 \公仔箱論壇AMAZING!
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9 X3 a0 D, {1 V5.39.217.76Even after you see it, it is still hard to believe!
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6 U$ j' I' d# w6 r9 L. Q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! 公仔箱論壇. a3 u1 N( o0 Z$ D# s- S
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
# ^' P. F1 u, [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.
! N Z+ w/ ?+ j8 M7 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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.76. T/ q9 ~6 @$ u5 F* N4 V) @
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Question:公仔箱論壇/ T9 s T% K1 U
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic," e, ?, x9 g9 Z" ?2 q/ l
Or just the weight of the water? tvb now,tvbnow,bttvb* X4 I& g k6 U; D. W/ u# c
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。4 t& e7 f! h( X) ^
Answer:
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- M0 p; T1 m2 a8 t1 Q! m+ u6 s5 |' M5.39.217.76It only needs to be designed to withstand the weight of the water!
' p( e6 K6 ^. L) e* N! Z- w* L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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The Incredible Magdeburg Water Bridge in Germany% U2 N. E+ U# I, v3 l3 ?0 m
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.
/ w2 ~$ W5 e1 D9 {1 }* y6 c6 EThe 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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2 q$ U7 A6 L5 ?! JConstruction 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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7 U9 Q* x' c& d* |* J5 J. v: Q! NTVBNOW 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。公仔箱論壇7 B d* m0 L. |5 \2 e6 Y1 L( k
2 L* o& D2 k9 i$ I6 F0 t公仔箱論壇
7 f8 D, E, [ q/ d; BTVBNOW 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。
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