本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 公仔箱論壇( _' x$ s o, [+ C J3 ?1 M2 ~
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If you are not a Physics person, read on and learn a fact of physics.
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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。3 z/ a0 k+ b# E) ^
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8 z- c& D- V, n: \5 hMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
: `1 V" g. ^( C" q& A6 M5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 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。/ u8 d- r J" m2 x, a6 P7 T* ~$ H
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
' |" j5 f3 J: H' W5 Z; c9 xtvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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。0 Z: A: x! G1 D" x5 _2 s/ Z; C3 w
. H6 `: Y/ U/ D+ x7 fTVBNOW 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: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。8 {; H/ o8 A% K( H
* X: v# N/ r, K! Y公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,+ D/ L: \4 E* c: K2 R6 L% C; x
Or just the weight of the water?
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Answer:
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' c' `7 u' H9 k$ c) C6 ^$ l; d5.39.217.76It only needs to be designed to withstand the weight of the water!
7 a5 y* P* T! t9 a& o# Z! x; JWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedtvb now,tvbnow,bttvb: P; w s* @; N
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The Incredible Magdeburg Water Bridge in Germany公仔箱論壇$ l) X2 [1 m6 l( i B& M9 L9 e
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.
; S/ u$ d- d0 E }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 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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# t* u0 `1 i0 ]8 a ^7 R/ @tvb now,tvbnow,bttvbConstruction 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. tvb now,tvbnow,bttvb: p/ j* t3 p- u$ o6 r
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4 U0 V. r5 b$ q7 x公仔箱論壇
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