本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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8 |- a5 {' }& P公仔箱論壇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!: k# {6 X/ ^0 V3 W7 K5 D j; A
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 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 X" R2 g- G6 K0 m" @
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。( q3 @# P2 q: @8 y4 f2 ]$ G1 E
It is located in the city of Magdeburg, near Berlin.
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( d' X5 F1 N* C3 }7 k N5 M& z* e% W0 Z公仔箱論壇The photo was taken on the day of inauguration.& w. U4 a% y9 u
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,9 \. Y9 g2 N: u) I* X% Y. k0 U
Or just the weight of the water? 7 w5 K( h: W/ S" Q. D7 ^7 \ _
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。: z7 @# L8 }! M- |' E
Answer:
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It only needs to be designed to withstand the weight of the water!
# i" F! s9 B @) S4 R ^1 N kWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
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( o; B3 h% O; m, q. |9 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。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 V: G+ P1 R/ P/ K9 f5 E1 @' ~
The Incredible Magdeburg Water Bridge in Germany
: T' T! E) c1 t9 \5 m& V a% I/ E& N0 fThe 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.
. _9 q$ E$ M) E: e3 mtvb now,tvbnow,bttvbThe 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. 3 j$ _ y0 x% n% ]
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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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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 A* t% G/ I! |
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。" D6 m' O& X! R( w8 t3 c! \7 E% b
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