本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb2 x. J5 @0 H! \" A: E" J
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If you are not a Physics person, read on and learn a fact of physics.
, |# K& _0 q, G3 j& GAMAZING! 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。. c) L( ~' @' o
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Even after you see it, it is still hard to believe!
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( p5 @5 V4 w' _; vMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5.39.217.76" r0 G+ \3 N0 i' _. C
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
0 U$ y- g3 |# E @3 I( z5.39.217.76It is located in the city of Magdeburg, near Berlin.$ i! b' M; W0 }8 s0 A6 a
t- W4 h4 O, N/ tThe photo was taken on the day of inauguration.
9 }! X7 ?% c ~2 oTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
R8 K" E* N8 S3 U) A! |# ]1 ~) \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。
$ A: d+ f( K3 Z. d' I5.39.217.76Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,公仔箱論壇* \; y5 B" q- r$ i( a
Or just the weight of the water?
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Answer:
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+ r/ K, j) x! }& x8 {8 e: f! q4 |It only needs to be designed to withstand the weight of the water!
. s# G, ]! E$ j* d$ aWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded6 `$ Z' D7 d& a" o7 R# E: N' M `9 g
9 O2 H: H x: ^& s1 dtvb now,tvbnow,bttvbTVBNOW 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 H: D5 C: q) H; U i) h4 d% E) s
The Incredible Magdeburg Water Bridge in Germany
( r; j1 c8 M1 E$ aThe 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,bttvb9 X8 ^7 I2 |' h/ b' Y# H
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. tvb now,tvbnow,bttvb% t4 v9 b& v5 H# z& y% l( a4 v
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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. 公仔箱論壇+ r. r0 a$ {- U% i
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。2 ~# O& ]% d4 v5 D: w6 D; {
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。$ e+ c- T8 u9 } u# @0 M6 x
+ i( G: D. K$ F0 F% j* Z公仔箱論壇公仔箱論壇" @! u) c# R* R1 E. M' A
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