本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb8 T& C3 i% r: M& f0 I/ Z
& P3 M, j; n- N# t/ i5.39.217.76If you are not a Physics person, read on and learn a fact of physics. 6 | p( p* y8 o% o2 G
AMAZING! 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。; Y* R) C- i3 e& a. [ a* G
* Z0 f9 [ K* C! ^" t- f# J& T公仔箱論壇Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb' {$ n( N# n3 Y1 r
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. tvb now,tvbnow,bttvb- `7 X2 A8 O' G8 b3 A( p0 ]
It is located in the city of Magdeburg, near Berlin.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。. D: P% E4 Y7 B1 q8 ?5 G
/ S9 V6 E, O+ |& P公仔箱論壇The photo was taken on the day of inauguration.
' p9 d3 x0 ~" W% u4 ]公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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。) @9 v$ o5 [5 j; a3 F
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Question:公仔箱論壇; ?% ^+ s+ u! i6 h6 T
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
* T6 `7 u! o* w6 }% otvb now,tvbnow,bttvbOr just the weight of the water?
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: g! q3 d/ [! N; j- L0 X5.39.217.76Answer:
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( o% ]1 b4 D. V3 a- ~2 c( v' ntvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of the water! ' A3 O$ b' Q# z9 f9 R1 h9 y
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedTVBNOW 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。3 L" d9 S/ t/ ^& U& H
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The Incredible Magdeburg Water Bridge in Germany
% c- C+ l+ J0 O! x$ T0 j% Htvb now,tvbnow,bttvbThe 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.: `0 T, R0 a, Y" ^: {5 `+ n% J
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. . r$ P8 F& C) _1 J" `! [
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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. 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。( g. ]$ d/ j: G0 W# @
$ u- m4 R3 e6 Q# b# x/ @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。
) h1 }, j& a1 K8 K. q' rtvb 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。, Y3 `2 k; }4 r! d
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