本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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& G/ O2 c; F. y! t; G8 K: ^tvb now,tvbnow,bttvbIf 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。5 o W- J5 I c* L4 i
AMAZING! 5.39.217.77:88988 O8 \/ e% h6 T( @) Q% D4 ]- z8 t$ }# v. @
4 o% m: ^0 E4 f5 U+ D, ]% v1 r5 rtvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!
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+ t% f$ x5 E# J' \+ T/ Z6 @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。1 R' u3 n2 f# ^/ U% R, X
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! % m, O$ K% a8 G# J( ]: G
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,bttvb6 ~" C5 X8 u+ X- }5 N
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb7 f% T3 }; x/ r
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The photo was taken on the day of inauguration.
) c: X9 f c2 y% m$ y5 w* z% xtvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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* A* ?% ?0 }+ y; j! w/ S, VTVBNOW 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。Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
4 F; Y' s$ e( S7 M4 aTVBNOW 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? : J ` C$ y( ~; n! F, ^- ]5 \
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Answer:5.39.217.77:88987 u9 i1 d! J% n( ~; f! j& Y
0 T- l+ J+ E) @( Ptvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of the water!
( j* T! o. r: J$ p. 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 loaded
3 s9 j% q) `+ `: cTVBNOW 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。
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- ?! o6 {1 H6 F4 O" k5.39.217.77:8898The Incredible Magdeburg Water Bridge in Germany
) e0 Q; Y" p8 S4 c9 p公仔箱論壇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,bttvb7 }4 F5 r1 z( t1 x+ C# T' {8 L+ X2 w9 O
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.
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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. 5.39.217.77:8898" S* t1 h g+ }1 B' B
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