本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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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。/ r7 i% @* N4 q" ~* |
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" n+ Z& a* L7 R+ w Y8 ?$ z" |" FMagdeburg 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。9 T Y" C/ s1 L
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/ t6 {. d" h! _2 S
It is located in the city of Magdeburg, near Berlin.公仔箱論壇* K' ?' M# E, ~) Z9 F
( Y. L3 f% M( B2 r i公仔箱論壇The photo was taken on the day of inauguration.www3.tvboxnow.com3 m+ y2 C ^& G. ~
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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( g; L0 |& a- N5 f% OTVBNOW 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。Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,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 O4 t( G8 \$ L
Or just the weight of the water? tvb now,tvbnow,bttvb% {7 H% O6 v8 `( x4 ]
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Answer:
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0 e" K. H) v0 H. M1 r4 ZIt only needs to be designed to withstand the weight of the water!
S/ l0 x& j# \3 Y: f# j, mtvb now,tvbnow,bttvbWhy? 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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, {0 P+ l( A1 R5 B: n$ B& pThe Incredible Magdeburg Water Bridge in Germany公仔箱論壇$ d6 S( \; }, }0 ]3 B' w
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.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 o& g& p$ t% a9 V
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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2 M/ j( ?6 N# A% q8 O! r$ v7 Ptvb 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.
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" H3 b% K# m( y- K9 O# ~! p4 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。
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8 _ D5 h0 [1 E: k公仔箱論壇( y& s3 [# l4 P. r: \6 D, V% f! _: ^
8 G" x+ J6 q2 C2 zTVBNOW 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。% j3 ~, W! r! u- D
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