本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics. 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。- I; K8 [' J0 I8 n' R: U+ c H
AMAZING!
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+ [% D1 I0 {/ q' U5 j' XTVBNOW 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。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。& g1 t( s: s9 j! K) j5 Q
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% h% X1 v% f" I公仔箱論壇Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
, Z6 [0 V/ t K5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
( R+ c$ Y( c! a, b- d, z' \/ MIt is located in the city of Magdeburg, near Berlin.
9 V, ]& s( C \4 i$ KTVBNOW 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 y. e/ f8 n7 G9 _& O7 Y# z
The photo was taken on the day of inauguration.
$ ? T% n- p8 y; K1 x' g5 MTVBNOW 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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.9 j1 i9 M! ^, S5 D' ]# x
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Question:0 o9 i4 N' j: W% E
+ @* W& w- }6 D5 W9 N5 P6 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。Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
0 m4 W; ]0 O! s$ Y! c9 G% o( I; 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。Or just the weight of the water? / y! O) t) U$ q' k2 |. x# @
6 C3 a0 ?6 t4 B+ f, A, }% q5.39.217.76Answer:
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5 {/ }+ W% D3 D$ B( J. j公仔箱論壇It only needs to be designed to withstand the weight of the water!
7 L, [ ^2 P k5 @8 \0 fWhy? 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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The Incredible Magdeburg Water Bridge in Germany
- i* x6 V8 G5 ~" l4 A: Y4 g! [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.
) v! ^1 ]* _3 c2 e/ x% o& mThe 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. : e8 N/ O1 t+ s" \! ]) B8 {4 g
' [! r2 r1 A* x) t! `0 {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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8 b1 X8 X- {( n6 m% \5.39.217.765.39.217.766 {+ y* C4 i$ |
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