本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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' j& e- o. U; r, O& X K公仔箱論壇If you are not a Physics person, read on and learn a fact of physics.
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0 u5 q& F* V$ N1 ^# i2 ?6 YEven after you see it, it is still hard to believe!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。+ `2 i) @3 e; V+ T- W7 s9 m
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* {5 r; K1 @# rMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! ) x \" s- H( A
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5.39.217.76* C2 x, u |4 |0 P. ?6 J' B
It is located in the city of Magdeburg, near Berlin.% }# L# `* j4 P$ N' A
: u# M' m7 c, b! O: [/ E: U: _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。The photo was taken on the day of inauguration.. ]3 ? F1 [) d1 G: _
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:5.39.217.76, [" x: ?1 R( J, Y/ {7 T' i
) n& J" Q5 ?" q- K公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,- ~- F6 \" W1 g* b
Or just the weight of the water?
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Answer:公仔箱論壇# v4 M7 S2 z4 K q" _, g
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It 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。& j, G6 s) \2 C( v& c
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 u! H( p" `6 R" n# l6 C+ R3 T- pTVBNOW 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。: \* n. ]8 b# W) R7 g3 B2 `
The Incredible Magdeburg Water Bridge in Germany
, ?* G% k- R! r! W3 Q8 L2 i5.39.217.76The 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.公仔箱論壇: T. a) L5 M+ z" z1 K. B9 f6 t2 a% N; r
The 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。 o+ s! u( W. Y4 b
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。+ Y+ c* }. P6 x
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. 5.39.217.764 C+ B2 @* a8 Z4 [1 F' H6 r' @
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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。, R) X2 A: f8 c G$ r# q
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公仔箱論壇& U& k% E8 G2 C; p7 l" z/ R
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