本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics. 0 }: z; M! _$ b* L$ L, J3 s# s
AMAZING! tvb now,tvbnow,bttvb5 |" Q$ F D* t O- F1 q
" d' i& B6 x& m2 \9 `Even after you see it, it is still hard to believe!公仔箱論壇. k, k" p4 e2 \# {' N
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* u9 v! N5 l: h$ j) _5.39.217.76Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5.39.217.76: w6 Z3 [+ C% h+ ?0 x. d$ n
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
/ p7 g C5 [9 g. {) l5.39.217.76It is located in the city of Magdeburg, near Berlin.5 O# i. j$ `9 h% ~1 t- }
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The photo was taken on the day of inauguration.
1 Q: |8 S7 B( |" Y" V- V3 F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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$ P) y' N U- i# r* a! _Question:公仔箱論壇* S, C. c2 T8 M. Q7 q; U
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,- c( ^$ P1 @; ]% K+ J6 f7 ]; H
Or just the weight of the water?
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Answer:
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" | M$ n$ \* a5 w' q2 M: l! J, K1 bIt only needs to be designed to withstand the weight of the water! 5.39.217.76+ Z: ]3 F) V- ]4 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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The Incredible Magdeburg Water Bridge in Germany
1 r" ?5 b& {7 C5.39.217.76The 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.
8 y0 V7 t3 o2 ^0 y' T& d5.39.217.76The 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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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. . `/ ^& w4 w& T/ d) w2 \: o) [ G! m1 k0 ]: E
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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。. [% J8 D$ `8 }- A; P
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2 |; d5 O/ ]! OTVBNOW 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, E$ W% v/ {6 g- O2 D1 B' W( y9 z
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