本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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/ {- ~4 D! n- O6 r* BIf you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb& K9 q9 U5 }2 W
AMAZING!
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9 J- f$ A0 @2 @3 E3 I; }5 q# ITVBNOW 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。Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb' S. u3 K, o) N5 ^! C# b
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$ y0 D1 P% `. F1 k8 n5.39.217.76Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
& V$ P# w. I7 Q/ 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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
/ H- d( K2 `" U* ` |4 n& Z+ {It is located in the city of Magdeburg, near Berlin.* I& }/ f" [) ~- {3 ]* x7 a
/ n8 {* F4 W/ o! HThe photo was taken on the day of inauguration.+ \) _- ~6 A! {$ b) F3 z
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,公仔箱論壇, V6 V* D- ~2 j ?
Or just the weight of the water?
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Answer:: U6 J7 f: P1 z4 @
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It only needs to be designed to withstand the weight of the water!
6 k. g9 k! q" J" ~9 e* y- E5.39.217.76Why? 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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' d! A1 X# i6 K4 d; Y2 T- n5 n公仔箱論壇The Incredible Magdeburg Water Bridge in Germany公仔箱論壇& S* v" T% j- c8 [
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.
7 \! O" |+ l" n. cThe 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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! a- s! G8 K# x1 ~! k& n: m) `3 r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.
4 y# H! h$ a/ U; Y `3 L公仔箱論壇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。5 J4 l2 y0 W$ k
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