本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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' F/ r/ [+ _+ T: |, F: g公仔箱論壇If you are not a Physics person, read on and learn a fact of physics.
7 v4 K5 D: u+ e1 Q1 O- Ytvb now,tvbnow,bttvbAMAZING! 2 f0 {, E5 B5 L: L
& w& W( j* V1 D& X5 \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。Even after you see it, it is still hard to believe!公仔箱論壇5 n {; i' ]) C1 w) x
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇9 y7 c& V, W+ N' T
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 公仔箱論壇! d$ @, L, T$ j; x2 D) Z
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.; p$ A! a4 a" m# j
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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- F4 }2 H5 W' y3 I) ztvb now,tvbnow,bttvbQuestion:公仔箱論壇$ T0 ^5 o4 V5 Y9 Q6 p4 N
0 ?: `* D. @& X) \5.39.217.77:8898Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,# r0 s' s4 [- {# J$ E! Y
Or just the weight of the water? 公仔箱論壇2 l# B0 _9 b/ d) ^* R8 R2 E8 I: H$ M
, o- l1 s! Q0 G% ^. \. w R9 a公仔箱論壇Answer:
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It only needs to be designed to withstand the weight of the water!
5 L6 W$ R2 e5 f1 }3 A+ F3 xtvb now,tvbnow,bttvbWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded9 ? ]4 t) ^, V5 n# R1 f
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The Incredible Magdeburg Water Bridge in Germany公仔箱論壇* u7 M* }" h( i+ f0 k
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.
/ F8 Y4 B+ {/ Q0 J/ B5 V0 N5.39.217.77:8898The 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# M' Z. E0 \0 d" L
- h/ ^0 p9 B: Q7 J9 @3 x2 A) h$ VTVBNOW 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。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.
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公仔箱論壇: J, r3 u. V4 t r' V
! Z9 A3 L2 i0 Z' t" H% O+ ZTVBNOW 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# G! [& M2 Z& e! o; {' u
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