本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 T: X% }; v4 n3 L' c
7 {* ]1 v) r- M/ v2 a$ s* |5.39.217.76If 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!5.39.217.76, S1 F3 h- o Y1 x+ h
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。) b% Q% |, |+ p
7 l- ?. x. b. I$ H4 |* xMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
8 O7 ~0 E! g5 {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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
" T( b N! Z) M! f5 NIt is located in the city of Magdeburg, near Berlin.
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~, g8 M( P) `0 Z8 t5 {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.
) C9 K7 @+ J' U; H公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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7 l) q0 n, g5 n' |0 [3 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。Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
( |* f5 H( G0 C G1 P8 T3 u8 xTVBNOW 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。Or just the weight of the water?
. f; q5 G" g/ Q5 U6 K5.39.217.76TVBNOW 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。& o$ X: ^( p! H. }( K' c6 ~9 N; J
Answer:
8 P. a. X7 d. Y, I: p! m公仔箱論壇
: }5 M( n# }3 h! I. v! p: ^5 p5.39.217.76It only needs to be designed to withstand the weight of the water! 5 }8 b0 x* o$ n1 O$ W
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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The Incredible Magdeburg Water Bridge in Germany公仔箱論壇! V8 R2 F2 q1 ~2 {) H* S6 o
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.
! f, M, s8 q: S# K0 s1 Q( v+ _tvb 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.
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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. 5.39.217.764 ~" C7 Z) X- s
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5 ` ~' N9 r( V: 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。
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1 N1 |2 h4 l; c( Q8 e! _6 FTVBNOW 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。
' ^; U6 a1 G" {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 H# x9 U* v9 K8 F# h7 V1 x
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