本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 & D/ _# @ q8 U5 [
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If you are not a Physics person, read on and learn a fact of physics. 9 a- T& C2 k w+ t H0 C. {! O
AMAZING! 5.39.217.763 P% M0 G9 P5 ~ V
* X+ e* s2 G E7 u AEven after you see it, it is still hard to believe!tvb now,tvbnow,bttvb, e1 o% h' ?4 l
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇4 B0 W$ r3 O1 y7 f' g4 |
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
W6 y% ]% i- m0 K# k, _It is located in the city of Magdeburg, near Berlin.
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^, h# a* c6 w( S6 _The photo was taken on the day of inauguration.
& \, ] k+ U- r* B) u) a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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Question:5.39.217.764 ]4 E5 C- \. o; q
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,+ ^) e; V0 F) E- L0 b9 z5 l6 x- f
Or just the weight of the water? tvb now,tvbnow,bttvb; U5 o7 M7 s: c% W
- o- L) h4 H5 V5.39.217.76Answer:
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- @+ f4 Z7 ?; h% h& I1 c+ }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。It only needs to be designed to withstand the weight of the water! 5.39.217.76' m8 W! N4 J+ w0 h% O+ f& h
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: t9 d( o9 `, @1 ?: ?( A2 v* @+ |- J
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( u$ G4 ]/ ~& Btvb now,tvbnow,bttvbThe 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。/ G; S$ P! R+ X" R" O- n
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.
. y8 c M) s c' {8 g+ {# r+ JThe 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. 公仔箱論壇9 O! _* G$ y( x3 ?9 O5 U
1 e+ U! f9 v7 @( }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. * x. W3 M( J; e! V# A, O' q1 v1 q
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 q- j8 L8 W5 h& B6 W) Z
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