本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
# m2 {% z% y8 n5 r! f7 Z3 RTVBNOW 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。) h# v$ R6 M3 w* ]$ t+ I
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!
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 1 x, Z1 ~' e* @
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,bttvb# R) d0 q/ `/ S3 X! }. t7 w
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
4 [& l( r1 N$ q( J- |" Y. [& n/ H ntvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
* G& T7 e$ Z4 n& 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。3 a* e. b" R4 X d. T8 R0 f3 G
Question:
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* {+ n; D+ J2 w8 L' D% v8 \; L0 vDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
3 F+ y2 _' d* h/ S! r2 ^tvb now,tvbnow,bttvbOr just the weight of the water? 公仔箱論壇$ R+ f6 \: P- C0 m
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Answer:' O |. t7 z1 l" d
2 l; K- ]: p, a( m+ Z5.39.217.76It only needs to be designed to withstand the weight of the water! 2 W/ \( q4 o- D2 D# p( X( Z
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded1 p/ f. g1 E G/ w) N+ T
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3 Z! E+ M* P0 t, t5 G! sThe Incredible Magdeburg Water Bridge in Germany7 n2 C6 F, v. m
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.
$ h( T, c1 S4 L2 J! T! n, e5.39.217.76The 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.
, P: D" b7 A9 }/ g+ m2 [: n/ 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。tvb now,tvbnow,bttvb( U2 e* n% [* _) d
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0 i; d% ?' a. A' B5.39.217.765.39.217.767 {: G# Y, g$ ^2 `: B$ a7 r' W2 H
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。 i% v4 n( x( X' a, b
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