本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 公仔箱論壇% n6 {) `" Z; h
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If you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb U+ u( |# x' o, K+ Z
AMAZING!
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Even after you see it, it is still hard to believe!6 L; N. B7 `8 \$ ] ^7 r0 h
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
+ t: }, k/ a( r) Z& Mtvb now,tvbnow,bttvbThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. % z7 G) ^( l! {1 d
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb: ^1 i7 l: t& ~, h. ]
! l# k' G7 s5 |* }; u' ]公仔箱論壇The photo was taken on the day of inauguration.
, M) }3 H8 g) A0 c7 ~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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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2 {6 a. W/ q2 _' Z6 S% n5.39.217.76Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,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。8 a9 l( `4 r* Q
Or just the weight of the water?
! k3 a9 W% [9 q: }0 _9 U2 w4 O4 }$ 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。5.39.217.763 p1 w. y K6 W5 ~. h% [% C' v
Answer:
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) T5 p9 V$ M% _: ]8 L: 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。It only needs to be designed to withstand the weight of the water! 5.39.217.76+ b2 O, {* N6 Z* t9 T# {
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! b! k* ?9 t1 _. m5 S) h
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4 f5 I5 s; k! Xtvb now,tvbnow,bttvbThe Incredible Magdeburg Water Bridge in Germany公仔箱論壇4 |# p# h" f7 B# V* K) ?2 x2 M
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.
+ K7 Y4 ~' e# r- O1 VTVBNOW 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 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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' t$ d% \' i3 M+ u9 p公仔箱論壇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。. z) a# z- Y6 e, Z R" w. a
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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。* }/ ]" w6 K6 y6 N6 X
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