本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb2 J0 k4 O3 f! \9 g5 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。 O {/ `6 {, q% N9 O( ?' k
If you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇8 X2 Q) S/ X# K5 q& ?0 H
AMAZING!
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Even after you see it, it is still hard to believe!6 v# x) }# E; v: U5 A: m
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' {3 G- I; c- k( D, LMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5.39.217.76, R/ [0 f7 c# o2 b& l2 X' m
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. ' p8 U T& E4 g
It is located in the city of Magdeburg, near Berlin.
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" B) s# t. v0 _1 z6 E+ s公仔箱論壇The photo was taken on the day of inauguration.公仔箱論壇$ z7 ^+ \$ V" x- l7 i g* S9 F8 o
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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, v: D3 Y1 V: z. c' f( \5.39.217.76Question:
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; Z# q/ {+ D( A! _! aDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
" P9 P3 n! K; ^0 ?; m+ LTVBNOW 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。Or just the weight of the water? 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。) R" L4 p1 x) x
& u, N9 N+ R) F8 S( wTVBNOW 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。Answer:6 J) K( b: l( F7 j! h6 E
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It only needs to be designed to withstand the weight of the water!
3 n5 _7 S" D* G% v! j; D5.39.217.76Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
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' b( x N" {4 ?! \2 hTVBNOW 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。公仔箱論壇9 }- F7 m+ E" c7 U" s
The Incredible Magdeburg Water Bridge in Germany
, z/ k& a( Z6 T& S' t' pThe 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7 M% l3 m' Q6 _& x. u' C# M9 m
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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n2 D D Z* a' ?' i& ftvb 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. 4 Q3 e8 y% ?8 F3 k
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% B* {+ g/ e+ v& @" b2 J$ ^' BTVBNOW 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。
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