本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb8 D1 t2 D; U; s3 @
8 U# P5 l1 Q$ D7 u$ V# pTVBNOW 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.
) M2 t+ c7 @4 ]% R7 rTVBNOW 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。AMAZING!
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Even after you see it, it is still hard to believe!5 v4 v3 c9 b- s7 c }: s8 ~ I% |
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0 C6 r3 G; k* P, YMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
) P% x- X) K" y* q G, Z+ \" Btvb now,tvbnow,bttvbThis 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$ N9 T6 o9 g& X. q% H
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
* i/ d# @" ^5 {: w; y4 F7 i公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
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4 g+ r0 `% `. Q! z5.39.217.76Answer:6 z% _+ a# [8 r! b) n Q8 Q3 f
- ~- G" A+ M& \. MTVBNOW 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。It only needs to be designed to withstand the weight of the water!
0 {) H" a8 J z3 ]; O5.39.217.76Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded公仔箱論壇$ I4 m0 [1 @, W' B9 h! u
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The Incredible Magdeburg Water Bridge in Germany9 J" @7 P) L9 T( \6 B
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.
. Z# F/ f/ ^+ G/ J! ?- \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.
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# _, p3 C( |( u- `( X, BConstruction 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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