本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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/ l, M, {, c, A5.39.217.76If you are not a Physics person, read on and learn a fact of physics.
5 x. u+ {) |' W' z( R( K8 otvb now,tvbnow,bttvbAMAZING! 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 E/ _5 K/ W( A' ?% _
! L$ T) y/ ~6 S& ~9 h; l' ^3 n1 q, s ?Even after you see it, it is still hard to believe!
, O. E8 b( m' }& v7 q9 C- n, u9 ZTVBNOW 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。
* I6 G! X/ l6 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。. y4 d7 m5 q+ w7 z0 \* S* q
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( a! r8 N& U) P* a9 D
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
+ @4 ~* J! h: T1 X; rIt is located in the city of Magdeburg, near Berlin. d2 z( H; {# d
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The photo was taken on the day of inauguration.
4 b, Q, j5 Y4 f; d+ d' M& yTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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# [9 R, _; h2 k1 P- _: Y/ _5.39.217.76Question:
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" `5 E' ~& \+ ^( a6 Ltvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb$ _. m4 f3 V) j) M7 m
Or just the weight of the water?
% B% @. o" c& X7 H* ?) p公仔箱論壇
, G% k$ p) I* e- P( ^" u5.39.217.76Answer:
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It only needs to be designed to withstand the weight of the water!
/ d& w7 \/ F, {' c/ vWhy? 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。' X3 i" N9 F2 `& j8 c" r
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。# c, W2 [, Z2 E
2 [) b( w- V0 y* x3 p公仔箱論壇The Incredible Magdeburg Water Bridge in Germany
5 Z2 k# ]% E3 k9 n0 }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。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.5.39.217.76. I1 K# g! P3 ?9 n+ e; V) i
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. 公仔箱論壇5 v! k5 b" x- ^4 s. _
7 U- f* g' H+ |2 @9 jTVBNOW 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。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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5 ]% b ]$ q1 R, n公仔箱論壇3 t2 j s& W( J/ N
$ w$ w( o, l& @6 W& Z% J k. 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。6 \5 F6 y: \2 D' U0 Y g; l
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