本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 , ~0 {+ N# H* t
6 @' q. d* L9 Y1 h/ Btvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics. 2 g" w- D( n+ s1 M" o0 E
AMAZING!
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Even after you see it, it is still hard to believe!, t; h/ l2 e( g( [, `
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
" B4 s0 N _: \* P4 P. oThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
, V; u0 x- x' b3 ^( H; j: vIt is located in the city of Magdeburg, near Berlin.公仔箱論壇' }7 ?& i* A# P9 _. p
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The photo was taken on the day of inauguration.
7 O8 @$ @- l! T) B/ G& T公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇8 m/ z; D+ I F3 c U
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Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.764 Y& G/ \# |- w- I# Q8 U- w: }7 q
Or just the weight of the water?
8 B! L% G8 K3 D1 c" x- Q; DTVBNOW 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。
1 I( c4 C6 M& f* XAnswer:5.39.217.764 Q- r! L. J# h4 s( U1 g; F2 k
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It only needs to be designed to withstand the weight of the water! 5.39.217.76' _8 q; ]# \0 u6 L
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
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. Q& r8 v) W9 {; w8 S6 dTVBNOW 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。The Incredible Magdeburg Water Bridge in Germany
" @( p: q$ }. i6 o r6 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。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.tvb now,tvbnow,bttvb+ d' _% E# {4 @6 `8 B- T( E, L
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. 7 T/ D% w6 k# H: x& g
* u7 y$ p/ q& {; y" [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. 1 Q/ P# Y/ W2 e8 F) Z0 c! o
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。6 [: A- o! w8 V6 j8 P) k5 _, [
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。7 \7 p& c) y* ?1 s
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。) m; r. K5 {+ j- C M
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+ N' ?, i; k. K v7 v
8 C0 h6 D. G: V8 F) Z, w公仔箱論壇5 B y$ ~$ k0 x2 b9 L; c; P
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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。; U F( d( M# m1 }1 R
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