本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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7 [3 y9 R& J7 A* A3 Y' L0 g公仔箱論壇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。* W1 `& k. V1 }9 p) Q- A% T
AMAZING!
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. L9 b$ S2 m0 |* z1 s8 f. Y5.39.217.76Even after you see it, it is still hard to believe!5.39.217.76' o( t1 m6 C# ~% ?
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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。. s* Y5 u$ g/ U/ d9 [
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
- O" Z9 ~1 w0 W) k) D7 p: M5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
( i: [7 R' ]$ J. R1 h, h) H3 wIt is located in the city of Magdeburg, near Berlin.
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' L6 d( [5 T) N5.39.217.76The photo was taken on the day of inauguration.& i; E/ O* K( W6 J! `( t
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
( G2 T/ X/ B; X0 W1 gTVBNOW 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' I3 V5 S; _6 c
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
5 i" u# ~) {; ]4 ?; r8 |7 q/ S5.39.217.76Or just the weight of the water?
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It only needs to be designed to withstand the weight of the water!
$ q Z5 e/ Y* t$ |, P5 z5.39.217.76Why? 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) \* p4 d/ ^0 G- L
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4 K- q: N0 m& J; \7 R公仔箱論壇The Incredible Magdeburg Water Bridge in GermanyTVBNOW 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。/ t' I2 N, o# b* T* y: d0 w
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.
4 j9 U y/ C& M. U$ D% P: ^$ G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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0 z7 f. F* C6 Xtvb now,tvbnow,bttvbConstruction 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( ]. k- l7 K6 F! T( X/ o
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