本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 7 v; e. w* ]: s7 V/ P0 a
& E* J; I- H' ^$ Ltvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.
+ x. \2 p) g: g1 s8 w6 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。AMAZING! 公仔箱論壇+ a+ B; ~$ c% z$ s
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Even after you see it, it is still hard to believe!
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|4 m" h& o3 B; G: b: _, Vtvb now,tvbnow,bttvbTVBNOW 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* v8 f# w. @' H+ C9 _$ |
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
7 d' K. w/ u, s$ C, tThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
) ]7 G* e( v/ D) gtvboxnow.comIt is located in the city of Magdeburg, near Berlin.tvboxnow.com" C% [4 \3 T! T7 `
" w& u, g8 j6 ?8 O. n9 M( l) QThe photo was taken on the day of inauguration.
a3 L; V$ y4 m1 [& u" t" g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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1 {/ X- G' H4 f9 Ttvb now,tvbnow,bttvbQuestion:) b$ b; J( V; ^0 x* n' ^! ~" P5 r
' h' q# W, _" G3 v; U! Y公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
4 H$ E$ `% y# _# [. f8 hOr just the weight of the water?
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* @; _2 I, u0 n4 w3 f, @) atvb now,tvbnow,bttvbAnswer:tvboxnow.com) J! J9 o9 {2 R* J# _
; o( K0 W- Z! Utvboxnow.comIt only needs to be designed to withstand the weight of the water!
+ ]" s- `- S+ ]5 a; [" z! E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 loadedtvb now,tvbnow,bttvb3 Z" g1 Q3 _! }% w3 I0 r8 O* E
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The Incredible Magdeburg Water Bridge in Germany- T& ^- I" R$ @
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.
- n' h5 @0 `! ]. T. W) s# J公仔箱論壇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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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.
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0 _1 h g a6 d6 z6 Y' P* }9 ]公仔箱論壇
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