本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb6 S' r( ~( k8 {- u" w& G
C* f2 d7 z$ B+ ]! e8 U; f$ g ~If you are not a Physics person, read on and learn a fact of physics. ' N) |- I, y4 y- K# B+ j0 Y* e
AMAZING! 公仔箱論壇/ X3 G/ y. ~* E- E* @
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Even after you see it, it is still hard to believe!www2.tvboxnow.com! E; p: I3 {. A* \; n6 i; r/ 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。( V! L9 k' U' v0 V5 p
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! % ]4 a1 n6 O: m, _
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 7 q: m- ?$ ?0 h9 |3 M7 H" S
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb+ q" c; S% `9 O& E8 c; D
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.tvb now,tvbnow,bttvb$ ]4 t3 c2 N) b% F; }( q/ F
4 \! r9 D! Z4 K( f; j; m }Question:
( Q( t! ?) [- r/ ?% ~# `7 @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。
( W# j: }4 p( |6 s9 M# v! xDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,公仔箱論壇; w' s# o# f5 M H( i. ^, K
Or just the weight of the water? www2.tvboxnow.com+ G; \' p+ J6 _- c" s" U
5 Q T' h3 b( d CAnswer:
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& `- u4 `2 o/ B4 _$ m. D! O3 sIt only needs to be designed to withstand the weight of the water!
1 y! O ]9 w+ H& e- U5 yWhy? 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1 f! \, b- I) P9 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.公仔箱論壇2 Z5 [3 Y2 P) j0 e+ x
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. 8 Q/ W. o; v0 M3 y/ q
J; K# A9 z4 B- Xwww2.tvboxnow.comConstruction 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。) O4 e2 A( p' m$ G5 T
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