本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 + p/ H; {- X4 f$ }7 j7 e# c
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If you are not a Physics person, read on and learn a fact of physics.
3 W1 n0 ^; u8 z1 }: V公仔箱論壇AMAZING!
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' Q: ?" ^2 s0 m) U+ ]tvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!公仔箱論壇2 x) N& A0 V5 v. E: V
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8 U+ r+ e( d: E" q1 P: ]5 hMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! # u! K9 |' P5 m3 H9 t2 L6 C
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. : d ~0 X& b* p$ c s8 l: D
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
L1 n; E/ T5 B& J4 ?公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.www2.tvboxnow.com6 t( y4 r: e& q7 E
! V1 d$ B5 q: c0 n: M9 Z7 k. GTVBNOW 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。Question:公仔箱論壇$ c! u( k: w9 U3 d4 p3 ?$ t# O
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,) L& i* f' f6 G4 v) T+ \8 t6 l9 N1 \
Or just 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。& O7 u& _* p7 `3 _
5 }0 O. J. i( G9 R* @0 ^www2.tvboxnow.comAnswer:
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) G7 h0 ~( \& f$ G; I3 s公仔箱論壇It 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。, T% `+ _- T8 Z" w
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedTVBNOW 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 j# J/ @0 j% A6 D1 H
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3 L/ D0 E3 E: B" N! t3 a7 M- c' k公仔箱論壇The Incredible Magdeburg Water Bridge in Germany
3 C2 o4 r- B( ~/ I' X- 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.5 I2 g# c! d5 [0 w0 B9 u. i8 P
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.
1 Q9 }3 f% O- G. o: WTVBNOW 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。
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3 a+ k: r3 K" Y公仔箱論壇
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* v% j: T% `9 M* h3 xTVBNOW 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。
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5 |' R/ h0 b( ~) s' }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。 |
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