本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5 @4 H) ?! l, g8 ~6 f& M4 Z" F
+ {8 v: @0 @& j, A0 U( _" z7 |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。If you are not a Physics person, read on and learn a fact of physics. 3 O1 I1 z9 N: D$ h. ?6 q" U
AMAZING! u5 k+ F6 m H, M9 s8 \
! v9 O1 p; \+ J( ?- A* g* g5 wEven 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。/ l* }0 R% H) S" O' I& i
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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- ? h; h0 n: ?; _1 ?' \' h3 [
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
\+ Z& A, d& c" h7 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。It is located in the city of Magdeburg, near Berlin.
! g6 r8 ]- P( A# M: ^& @6 w) ETVBNOW 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。* X; E: b( b/ Z8 d- ^2 y1 l
The photo was taken on the day of inauguration./ L+ s* d- X9 X
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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$ e! W& q! x# Y6 Etvb now,tvbnow,bttvbQuestion:
; ?) P1 I: @6 d y/ [- b公仔箱論壇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, _) u! F/ U l+ ^8 S$ b
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,. r' d0 A9 v ?& H6 [& E- G9 E6 G
Or just the weight of the water?
( Y1 \- ]& v8 o( B, 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。
: F3 x8 j) S$ T( N$ c0 P- L+ ?7 `tvb now,tvbnow,bttvbAnswer:
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It only needs to be designed to withstand the weight of the water!
. H( a i" n3 x. Z8 T2 F9 l公仔箱論壇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" t2 w/ h$ n3 ]6 ~. g' a
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The Incredible Magdeburg Water Bridge in Germany
5 @: p: a) T+ L1 f, uThe 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.) V1 x# E p$ F1 L
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. % [) |+ _: D2 p( ]" j8 r
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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. ' R* P: r1 G. H
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8 d/ _. h3 ?2 O; oTVBNOW 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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+ i" o8 ~9 J; H7 H) U公仔箱論壇公仔箱論壇" g5 o9 [1 D* m8 T; ]/ _ `& G& B
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