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. 公仔箱論壇$ S9 e9 B' q9 T. @- n0 e
AMAZING! 6 @+ w8 F; R( z) X
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Even after you see it, it is still hard to believe!. q) p7 z B4 Z# Q9 g
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% } a. s) ]1 `, [' gMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
. R4 i6 k) L3 H; \$ R; W% EThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
: j( U8 g* x9 _. w* N& z7 I$ a# b& L公仔箱論壇It is located in the city of Magdeburg, near Berlin.
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1 i+ g9 {5 _* S2 z& p% hThe photo was taken on the day of inauguration.5.39.217.760 Z/ W3 W4 Z+ O+ w/ y' \' |% Z/ F3 o
To 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。- N5 b6 S# e, ^) r- U
2 z4 \1 ?5 |3 L5 O0 |, y) dQuestion:
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: e; V6 _5 u& ?7 s8 aDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.76" r3 [' G$ }1 |, i: n: ~+ k
Or 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! 5.39.217.767 U4 n# U" w0 B9 ~& Y" l
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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) `; F# c9 o0 }2 ]; w7 b9 T+ dThe Incredible Magdeburg Water Bridge in Germany
5 q! l* v# a9 G2 c7 y% \% O( K% E% Y5.39.217.76The 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.
, H8 C! H. c* l6 H& \0 F" T4 P$ K' CThe 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.
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$ ?0 J `2 k4 c% e4 M' F, i8 gtvb now,tvbnow,bttvbTVBNOW 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。" G2 u1 W1 R7 F) Q3 t Y" [
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' X" t- n% p5 v% ]+ }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。: ]5 V* ?. P1 `# d( j# d
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