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. 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。- N2 h: @ I, S% x# I/ s$ g6 z2 u
AMAZING! tvb now,tvbnow,bttvb' q! g+ A: h0 B% l$ R/ e
7 `8 a9 x7 f- ^* n. N" y3 H" UEven after you see it, it is still hard to believe!
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, \9 @' u7 s$ G7 `( _5 N4 U' SMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
2 h: R4 v' i" [. A" q5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
* T+ E! F- Z3 u4 B2 q公仔箱論壇It is located in the city of Magdeburg, near Berlin.
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: z- L3 i7 R6 T2 t' f5 HThe photo was taken on the day of inauguration.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。7 Z% R9 l: E6 E: M! j
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:5.39.217.765 K# L) {% u: g- i) s B
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,( H4 q9 `7 }$ p3 u: A
Or just the weight of the water?
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' q% _( Q, N ~6 ^8 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。Answer:
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$ m' a6 ~, }- m4 wIt only needs to be designed to withstand the weight of the water! 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。. E+ `/ F/ y- E$ O4 P
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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6 o$ F9 T H7 G# H# o" r5.39.217.76The Incredible Magdeburg Water Bridge in Germany5.39.217.76" R9 g# n: X8 e/ j+ R4 C
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.
3 j3 @% B) p: J0 d1 @5 GThe 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. 公仔箱論壇* W1 [# C/ ~2 l( D
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7 a# H# p4 h0 `7 ~+ 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。) l3 E2 }; i' t) T
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