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. \% Z! q% I% t# I
AMAZING! ]" E. \$ I3 t& C! K( @1 E6 Y
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Even after you see it, it is still hard to believe!
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4 m7 [2 C# }0 f2 Vtvb now,tvbnow,bttvb
* v3 ]0 \) M* m' v7 c. J: HTVBNOW 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。Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇8 j5 G* Q+ d: s+ j
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
; y7 k7 `6 l9 E0 `+ J( r8 utvb now,tvbnow,bttvbIt is located in the city of Magdeburg, near Berlin.
, Z. e- y. |- I @$ m2 vTVBNOW 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。$ a1 m# ]6 s# d9 S. p
The photo was taken on the day of inauguration.
2 x {- W- b* b) M( s) ?# {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,
4 l4 X* y# u2 K/ I& Z% jOr just the weight of the water? 5.39.217.764 z5 R" S- P. f* a4 k- b( g
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Answer:
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It only needs to be designed to withstand the weight of the water! % h% m$ \, m8 p/ a+ k# f/ w
Why? 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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$ ]8 {; i, q7 R WThe Incredible Magdeburg Water Bridge in GermanyTVBNOW 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。* \2 \& @8 ~5 n
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.
! F% ]0 w4 R* m. z' ZThe 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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( O. s8 R N G+ ^; F" ~tvb 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.
' m9 b3 ~, Z& }# \tvb now,tvbnow,bttvbtvb now,tvbnow,bttvb; q4 _9 i, e( V! ~
3 q& I) s5 K: X$ b* b5 tTVBNOW 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 A* z3 y% F2 t, K
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