本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.760 f1 ^ C, M; G7 n$ y2 Y6 Q5 s
% {* H% F% l% aTVBNOW 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.
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Even after you see it, it is still hard to believe!公仔箱論壇# L( S' ?/ ~# B- n
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: D& d$ b) h1 _Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb, C9 e1 f z% }* B) w; i
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
& [+ p. g9 q- O; k5 c7 t& kIt is located in the city of Magdeburg, near Berlin.
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# K, n* ]% h# b2 XThe photo was taken on the day of inauguration.
/ T$ D: `! o1 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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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% @" O9 }5 a+ X, }Question:
! p5 P4 E4 V5 t- |8 l) D5.39.217.76TVBNOW 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。$ Z& h/ n2 @0 ?4 \" {
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.76% `% N8 w* b; i' E' Q. w7 {
Or just the weight of the water? 公仔箱論壇( n6 E: H Y H
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Answer:
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It only needs to be designed to withstand the weight of the water!
6 x* t5 \! U9 n1 @( z: KWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedTVBNOW 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。* A2 x) v% f, W/ z. [( N
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6 H) N8 y$ I6 \* C公仔箱論壇The Incredible Magdeburg Water Bridge in GermanyTVBNOW 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 r* L9 \5 J5 p
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.
# \% w/ h/ N- E2 e+ {+ {% f2 q; O5.39.217.76The 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. 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。* t% Y. J+ r' a
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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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