本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb8 S" ]3 i3 g7 k M' e, v3 O
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If you are not a Physics person, read on and learn a fact of physics.
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. U) k7 x$ u& [tvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!
3 [/ t+ L: u/ |- n {; N& f3 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。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。) I# ^* ^$ i; v
7 j3 E, H* u$ g; ^2 h5.39.217.76Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! * F- ~: f$ N* ~+ g
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
/ h& e( l( h, {- p: b) ~1 H) B5.39.217.76It is located in the city of Magdeburg, near Berlin.
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7 {* v; n; K( O) v5.39.217.76The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb+ E* W4 |* b1 j: I
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.76 w% B4 F# ]. s7 [
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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,
X# z# ~- V3 R' U& C* U+ G; X公仔箱論壇Or just the weight of the water?
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Answer:
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3 t# X+ d) q c; |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。It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb: `2 \% X$ v; s9 K" t4 K
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; Q( L5 y3 l2 H$ a+ i3 t$ F) {
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6 N/ a- y% R% X/ b f9 w) y5.39.217.76The Incredible Magdeburg Water Bridge in Germany5.39.217.76' f) Y3 z& I8 m: o+ U% r* Z& T' `
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.5.39.217.76! c2 c( R$ P' |, E
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. 5.39.217.76; @* r8 u* Y1 u) E; B* H# ~
+ R. {1 ?9 ~; Q2 w, E5.39.217.76Construction 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.
8 q1 q0 i5 Z) E5 rTVBNOW 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。3 z) k% _# |) n: A5 k3 [
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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。( c7 e. f; f* W
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