本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 ! \( S# L2 u7 y8 n7 \" r% A
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If you are not a Physics person, read on and learn a fact of physics.
. i3 l1 r1 }; M/ g3 B8 i1 K! @TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。AMAZING!
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( C" a U+ \, Q6 _( ^4 a" WEven after you see it, it is still hard to believe!
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4 L& y8 V/ ~! q! q$ ETVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。
$ {0 E, b" c J7 z1 o5.39.217.76Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
7 q; r" ?8 C# O4 ?0 GThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
* @5 @) o5 S2 x# F' B9 B% f% rIt is located in the city of Magdeburg, near Berlin.5.39.217.76, R$ f. W, J- g& c V
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The photo was taken on the day of inauguration.
- R1 Z& S- A1 \# L) {4 h, i5 E1 wTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.: V8 G5 V( C) _+ M* `
; Y2 C# }7 W& t0 UTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
4 {# c5 R8 C/ q$ w7 A5.39.217.76Or just the weight of the water? 5.39.217.766 W" P' D- W! |- G: p3 ?
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Answer:
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3 U/ `7 N- X0 n+ ~. l Q公仔箱論壇It only needs to be designed to withstand the weight of the water!
7 q4 W# g, \) G& M: b公仔箱論壇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
8 L$ B3 q6 q' `/ i/ R0 F0 TTVBNOW 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。, [& U8 Y$ O# L# H1 y2 Q" l" o0 L
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The Incredible Magdeburg Water Bridge in Germany
! k% O$ ?$ C4 x% h% sTVBNOW 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。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.
" S: Y. E Y7 l# T2 g$ Z% _& L. d. otvb now,tvbnow,bttvbThe 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. + p3 B4 F1 n) B. B) \9 P
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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. 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。) _4 A) f9 ~5 T# Q. ]+ N& G
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