本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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5 v" ?/ K; D5 k% |- w$ q# H公仔箱論壇If you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇9 [* W) v# w/ z1 L3 J- E
AMAZING! tvb now,tvbnow,bttvb( ?% o+ u* \! r8 }
& P* K1 \7 W* p) c. \1 Qtvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!8 t# ^4 ~/ o, E0 ?' X3 \7 E: D
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。/ W4 Z. a! h1 N7 ]
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb1 V# U0 f6 B; h! Z s
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. & e0 l: v l/ }' |0 r8 f
It is located in the city of Magdeburg, near Berlin.
8 f, P# C6 ^' o/ ATVBNOW 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。& k) T/ o8 K5 a" G* ]
The photo was taken on the day of inauguration.
% v! d* n" m2 n9 R公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
, t9 W; T. U" z& T7 H9 G5 C6 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。
* l8 m0 c$ X; ~% p5.39.217.76Question:* b0 N G0 [8 J w$ i
0 W/ _2 l5 a% v+ MDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,3 r ^' D. r- w% z/ Y: K+ ~
Or just the weight of the water?
r, o+ F' l1 x* ~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。
7 U' k. Y0 i' z: s5.39.217.76Answer:tvb now,tvbnow,bttvb' b, {1 i9 V) K4 q
( D7 W* D* b0 i, t6 [tvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of the water!
. l5 v2 t+ V, o+ _2 I6 LWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
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/ R: n2 L. B4 `# e+ B0 u! x8 C5.39.217.76The Incredible Magdeburg Water Bridge in Germany
% O+ ]6 F( _0 l0 A' HThe 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.
* O. g0 V9 x' T5 I! t- `# q% ]. r; X1 oThe 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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. y& Y1 n p) b6 A, a( m2 U' u5.39.217.76Construction 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.
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8 e& D, _3 X0 b9 Rtvb now,tvbnow,bttvb
; c4 N+ x$ o1 E$ ~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。tvb now,tvbnow,bttvb! `4 ~- _' F6 }& ]6 e) P
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