本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 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。: H9 a0 b4 ]* d# a! V
8 t8 k+ I% ]( X7 }1 sTVBNOW 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。If you are not a Physics person, read on and learn a fact of physics.
) y. u" Q, e- q0 d c) N2 I: D9 ntvb now,tvbnow,bttvbAMAZING! 公仔箱論壇) ~, v! W/ x- B
# s( ?& w6 X) x. h) H: X7 S公仔箱論壇Even after you see it, it is still hard to believe!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。5 `+ J( h* R9 q5 V
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。4 _% x3 w$ i$ `+ s8 F/ X6 [ P8 e
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇7 a1 F h }0 o3 p- i/ F
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
( e, _4 K- 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。It is located in the city of Magdeburg, near Berlin.( o+ |* m, S- N# C8 K/ z8 I% C
/ E8 P9 J" m. @4 Itvb now,tvbnow,bttvbThe photo was taken on the day of inauguration.
6 o* [. o: W. ?( z* h公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.tvb now,tvbnow,bttvb2 X. ?5 g+ C& s, ^! u$ T" Q( j
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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,
, V7 |0 }$ \7 O9 Z! jtvb now,tvbnow,bttvbOr just the weight of the water?
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Answer:
+ _/ v, n' }# z2 V; p1 ^tvb now,tvbnow,bttvb公仔箱論壇1 x# l/ P. n$ w i
It only needs to be designed to withstand the weight of the water! , e3 x9 i3 C4 l% L( P$ q% X+ d
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded4 a: d, b& ^9 P0 \" 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。5 a# c8 A) e& D3 v6 O8 J! e
- T$ h+ A- [- H公仔箱論壇The Incredible Magdeburg Water Bridge in Germany* j. V# H$ r8 f
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.
0 D* ~# N5 ^ l5 o& {. CThe 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. 0 p u2 K5 b& I
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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.
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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。- D# r- _0 }' ?. H& W
) y! Z. ?' f+ }" m$ b5.39.217.76TVBNOW 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。) P' t# M* [4 Y" o1 d
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