本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 7 \. ?7 x9 \ n/ A! {% e
3 ], [$ @: i. }" u$ {tvb now,tvbnow,bttvbIf 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!5.39.217.762 a2 X) x9 Q1 X2 W
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
, w1 g6 t2 D$ E4 s" fThis 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; z7 D7 ^! Y( b7 y
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
8 M4 |8 r0 l1 a$ {" htvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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+ \2 U" s6 _' m$ P# N5.39.217.76Question:公仔箱論壇2 E- F$ M- u9 J$ ^
2 ^; M& E) ?6 c" W; n7 d$ A: K5.39.217.76Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
8 _3 b/ O* }& Q7 m1 a; \3 g5 y5.39.217.76Or just the weight of the water? : j0 G( b0 {. @9 a. m: J2 l
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It only needs to be designed to withstand the weight of the water! 5.39.217.76% ^/ W: s2 d# J, l! O T, ?8 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 loaded5.39.217.76* i) g$ e, _( J) u* I2 B8 }+ S
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The 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。6 p0 t' p: D ?8 a# j5 v
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.6 x2 h. f& l) @# D, t' A- }
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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/ J9 {, {8 W. |3 u' m公仔箱論壇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.
. e4 C9 q! r# Utvb now,tvbnow,bttvbTVBNOW 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。1 [7 _& Y- u6 n9 f' o5 w% ^7 n
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" B3 `: [0 j6 r, L# {) t- p* r 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。
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