本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb: |- T- {( e! W( q" k3 t
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。/ F, r& J5 u# E; ~2 ?, g+ j8 \* Q- ^
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 A) t8 X- C0 ]1 Y5 D5 [% hThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
1 q6 [, M' }3 j& c+ s( Atvb now,tvbnow,bttvbIt is located in the city of Magdeburg, near Berlin.5.39.217.763 f6 o. b3 [( Q/ A
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The photo was taken on the day of inauguration.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。, q0 ^9 W# X* h0 E
To 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。4 D! J" B3 {% l* J; P; D
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
2 g4 F2 m; }5 F) G% [* v, B+ @Or just the weight of the water? 1 ?( f, R6 d5 f% F$ b% 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。 n, r, ^; P0 r, [
Answer:
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It only needs to be designed to withstand the weight of the water! 公仔箱論壇% B' o$ ~% F) s& K
Why? 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! j& _& r) S" i
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" [6 x$ W2 S9 v4 i: I4 j5.39.217.76The Incredible Magdeburg Water Bridge in Germany5.39.217.76" [2 h- w' C& [' d2 n& b/ f# }5 t
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.
4 T+ ~( O& r; \5.39.217.76The 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. tvb now,tvbnow,bttvb: A9 |1 V, F: p: ?2 U* X7 _6 \
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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. ) S% w! w' D8 v4 Y8 }& K
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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。/ q9 Z" t5 F4 O, C9 T5 c
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