本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 公仔箱論壇/ t1 {& Z+ n0 w% d2 q) [
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If you are not a Physics person, read on and learn a fact of physics. ' c6 M2 p- f) y$ M3 g: [
AMAZING! 公仔箱論壇/ `7 t( s. T- F9 q) W; ?0 Q, }
! }7 f4 U/ N) J! |6 r( |2 r$ _tvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!公仔箱論壇, i2 b* K0 n# L
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* ]5 k5 l4 y0 `8 q1 o) x$ otvb now,tvbnow,bttvbMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
& t% l6 g% h6 h; X1 Z1 _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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
; Q n5 Y9 v J; a- y公仔箱論壇It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb' ]; R2 q/ p+ Q/ \$ H; b
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The photo was taken on the day of inauguration.
1 f- \+ e% n! N1 B! D8 c公仔箱論壇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,
+ T9 x# B, F' T( C" t, H0 ETVBNOW 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。Or just the weight of the water? tvb now,tvbnow,bttvb+ F$ W/ X1 Y A0 F4 y( b* I0 s# l
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Answer:5.39.217.76' M% a+ h: I6 C B
1 I4 B$ c+ ?/ ~5 T- Y0 |; `tvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of the water! 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 q. Y* @# Y0 @3 S7 U2 b& M X
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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# d# x8 w7 m7 \! k" c/ {1 WThe Incredible Magdeburg Water Bridge in Germany
' m4 t* b3 n/ I. h5.39.217.76The 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.5.39.217.76$ _& B" T& [3 R( ]+ w: L0 v& 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. 公仔箱論壇( @0 K& r8 i& F N1 v% @! m
9 u0 H7 L1 W) }* w# `" N1 etvb 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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& c+ C$ L6 q) _ JTVBNOW 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。tvb now,tvbnow,bttvb* c4 n% ?6 Z) T' ]. P* w, I3 Q1 d7 O) e
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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。6 ?! r' d/ ]4 Q
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