本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 & M6 o5 P0 X( L+ r' e: Y, R, T
$ E: X! u4 h2 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。If you are not a Physics person, read on and learn a fact of physics.
# I. C" ~/ f! Q' e6 z1 itvb now,tvbnow,bttvbAMAZING!
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Even after you see it, it is still hard to believe!
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4 ^' z( E+ z! B3 @: g5.39.217.76Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5.39.217.766 E' n, X+ n) v
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
/ C1 j2 m4 E; V2 qIt is located in the city of Magdeburg, near Berlin.
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( l9 }; `4 h+ C" Q R7 Z& yThe photo was taken on the day of inauguration.
: V9 q* }/ b9 q1 @1 ^" G# R1 Jtvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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。) l1 U4 T. [$ g8 a3 A
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Question:
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; p* o( _5 {4 o4 U) {Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,, L& ?. Z0 `& \7 A+ f$ n4 y# q
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。) J( O1 ~. \+ g- Y0 y1 ^* r
5 _% M, u3 K2 V% [4 t5 I* q5.39.217.76Answer:
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4 I* q3 q9 U2 i0 a P& {3 f. MIt only needs to be designed to withstand the weight of the water!
; v$ Y* v0 s- KWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded" t1 Q0 g' v/ J# H' S' p" J
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The Incredible Magdeburg Water Bridge in Germany
; o0 u7 [7 z1 D( q) N5.39.217.76The 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.tvb now,tvbnow,bttvb6 _' \7 R' V8 {
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. 公仔箱論壇& v% u" [7 V1 { [$ U0 Z& M
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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. 公仔箱論壇' Y4 Q: M6 ~5 a2 }, S, y
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