本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.77* a3 a4 Y9 h0 o7 S6 j' j- X2 r
# m* E" e* v$ s" k+ m! B }3 Otvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb8 T6 M! U& l( m3 x$ K/ G7 }
AMAZING!
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Even after you see it, it is still hard to believe!5.39.217.77; b" A, o$ f: [5 s
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, { v, V, q7 n' z9 M) E! [2 d' EMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb, n, z; X, I; C3 v7 w6 b1 z, z% u" ~
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
+ P1 W- H' D/ A& Q6 ~5 l公仔箱論壇It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb' o# J/ |1 C3 {0 ~6 f
& [8 b. L* k# p# t: v' k公仔箱論壇The photo was taken on the day of inauguration.公仔箱論壇+ n$ P( D8 G# P- p$ y
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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。, M' A0 j a6 {& w
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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,5.39.217.775 |' S9 ^7 }* ]0 K% V
Or just the weight of the water?
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Answer:5.39.217.779 A$ u: [% {( {# }
# T! @& H5 h" x+ fTVBNOW 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! % S' j' i8 ~6 T4 S, M7 e7 t
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
1 J1 s/ S3 t5 k% p公仔箱論壇' T4 w9 m# E, p% m9 M5 W* x
* S0 s- H' \, }( w5 k' N: zThe Incredible Magdeburg Water Bridge in Germany
# C% h/ U) z1 ]/ t# Q+ j- ]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.公仔箱論壇6 ^5 ~' N8 |6 u
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. 5.39.217.77 I7 |* z s6 {/ S9 J5 B0 v
: O$ `( R3 w: ^8 n9 [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. tvb now,tvbnow,bttvb: C+ h# Q5 v% ]2 g3 @& ^" X
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7 q4 R( @! u; D, `4 w1 B% |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。9 i& C3 M& O5 ~
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