本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 - }& N) J6 U B8 S( ^: b6 n, a
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。9 B. L- R( i! Y" n+ `! R
If you are not a Physics person, read on and learn a fact of physics.
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7 w# d2 W/ x8 R( v% `4 ~+ L! gEven after you see it, it is still hard to believe!
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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。* P/ Q. q, q( H* e
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 e4 U- k9 O* Y% G h) o/ D8 \' E; G- D
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
! c, I, V* x$ O4 {$ e6 g- H/ {It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
/ Q* x/ Z2 N" j+ t6 j+ x5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.762 r! F. S1 Q# J- S( D( i r! b
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,公仔箱論壇. g9 h+ `- w0 C. ?0 H& y
Or just the weight of the water?
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9 w, v9 d* Y$ l4 }Answer:tvb now,tvbnow,bttvb% A! a- {' B% z1 s2 V+ e& h- b; a
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It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb. }9 u" q+ \0 U( Y" | 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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9 Z' s8 r% h9 J3 u* DTVBNOW 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。The Incredible Magdeburg Water Bridge in Germany
# N2 c$ E! j4 k" t) lThe 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.
& v* @" Y6 R( s0 @2 y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. 3 R2 B \1 G% m# W/ z- k9 @" U
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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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$ w! U. \+ a* r4 o% y9 YTVBNOW 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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