本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.76 l; e9 j9 ~& I- h. P, R& w# @
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If you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb" V0 x4 A5 ]: W8 h0 i( j# z
AMAZING!
# o+ [6 m# y8 g+ n) s: g0 ztvb now,tvbnow,bttvbTVBNOW 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。! v( ^3 h/ D$ G6 H- g1 l. E
Even after you see it, it is still hard to believe!2 m" c) @3 U) a( u5 A3 B9 E
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% V' L! j/ |3 w7 v& g) }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! & X; ^) y* g* |# v1 h
This 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。7 Y# r# z& ?+ [/ ~
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
4 J3 \& L: W! x) }9 n' \5 v0 ]5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.. X4 [9 D# h+ e# \' D$ c
! Y3 [4 E% ^" ~. P6 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。Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
# w9 o8 \" ?* ~, V5.39.217.76Or just the weight of the water? 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。- v* I, s% y" a" L
. ?- { _9 s; i& B7 x- JAnswer:公仔箱論壇 C8 Q6 T2 m5 c5 ?
4 d/ F2 I4 ~3 V" m8 Y2 T1 A1 c$ TIt only needs to be designed to withstand the weight of the water!
+ v+ H: z `6 \0 [4 p1 i1 d5.39.217.76Why? 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: h0 v! T" O, Z
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The Incredible Magdeburg Water Bridge in Germany
g. k) |' J" Y) C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.公仔箱論壇( ~4 y- v* j* f" }0 Q7 ?) l; Z
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.
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