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。3 [$ ~4 g/ U! y3 D. h" x2 [! b
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If you are not a Physics person, read on and learn a fact of physics.
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Even after you see it, it is still hard to believe!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。 f2 L1 c4 T9 _/ T! v
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
0 J* `' T7 u% m3 N4 k0 ^" Dwww.tvboxnow.comThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
; s9 E: n6 s) A! ~7 y$ a; U& f* N% S3 Twww.tvboxnow.comIt is located in the city of Magdeburg, near Berlin.
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, W' l7 Z/ v3 U) G+ L$ @4 a$ T+ |The photo was taken on the day of inauguration.
) I7 R. v. L. g! h6 r$ gTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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) u+ N- D; A9 ~5 `! Nwww.tvboxnow.comDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
- G8 q# H! l9 J+ l6 w/ B* T% s1 n$ R+ kwww.tvboxnow.comOr just the weight of the water?
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Answer:
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It only needs to be designed to withstand the weight of the water!
# }) R: y0 @5 d/ A9 oWhy? 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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6 |; Q& j) @, {3 ^The Incredible Magdeburg Water Bridge in Germany( q8 Y; ^! B e3 ~7 W
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.; U* B. v _5 R) G, o
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. www.tvboxnow.com- K7 i+ L! ~% V2 C: k5 _- q
: o# T$ Z: K ~9 V2 M) a: M8 s* ]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/ E/ D N0 s+ |- l! b2 j4 k- ~: w
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( m2 J1 f) q1 z, F$ n/ |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。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。! N* ~/ R7 Z9 e9 e" ]- d
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