本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.778 b4 a$ v' n# A3 K
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If you are not a Physics person, read on and learn a fact of physics. 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。0 R9 z' o' a, U$ N, t
AMAZING!
5 J% ~6 z4 U# s' F0 H' 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 ?# `0 M5 B( X4 p4 j* j( d( K
Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb [/ {, S( N; B
9 \+ _/ ^/ E" o: 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。
* F6 H8 o' D6 M$ A$ D! @/ F公仔箱論壇Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
x) N$ I8 Y& Y& Y. j( l/ |: @This 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,bttvb2 C& c4 q* S; |( K+ `- X
It is located in the city of Magdeburg, near Berlin.
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0 R' d8 @; t3 N Y" mThe photo was taken on the day of inauguration.
- Y- o, I' J8 }" Ktvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.tvb now,tvbnow,bttvb. ~9 I/ X! r- A" e
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Question:tvb now,tvbnow,bttvb7 y+ e( h7 O5 b+ S' g# z2 B( p) ]! \
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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8 _" p. P* o: ~
Or just the weight of the water? $ [3 }- I) N2 A+ J# b5 b7 @, t
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Answer:
& O0 g7 m" ]5 f6 k7 STVBNOW 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。
2 e; r% V% Y* T! B0 b& L5.39.217.77It only needs to be designed to withstand the weight of the water! " h8 Q1 h" l/ c+ A
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/ |8 y X/ h1 ~0 b/ i( j( ?
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The Incredible Magdeburg Water Bridge in Germany
0 g+ h, B7 f2 bThe 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0 b: c. q. p# i2 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.
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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. tvb now,tvbnow,bttvb2 O" F# i7 ^; g: m, N2 v
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3 r8 s9 W, A) ytvb now,tvbnow,bttvb5.39.217.77& G2 P4 h$ n9 L/ H; D/ u
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