本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 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。, D) b9 s; Q* a1 K9 J! W. @5 y l
+ o+ e- t0 r3 }% otvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.
6 B" O* m U0 _7 c& [6 v公仔箱論壇AMAZING! 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。3 `* @1 A3 ~' U
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。' h/ A2 p# g& W0 }
Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb5 }) r K$ K& m( X5 g. q
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0 D; U: s+ z. n# S' W# a' U9 E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 `+ {; t2 i7 Utvb now,tvbnow,bttvbThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
Y2 ~3 z) A3 q2 l9 zIt is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb* }6 l5 [4 ?% ]( d/ k s
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The photo was taken on the day of inauguration.
2 Q; | w! f3 R) j0 C+ {2 ZTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
2 b' m0 l' y& \$ N' b5 cTVBNOW 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。, c8 y, D9 K v# Z' n
Question:5.39.217.76* x* p3 C9 U d" M0 }! U
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
2 K7 B6 R A/ M- [tvb now,tvbnow,bttvbOr just the weight of the water? 5.39.217.76) d, [2 E( Y$ N3 }' c/ B" 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。 S4 u1 p1 q9 i8 |
Answer:
7 v# d1 ^. k* x, D% mTVBNOW 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。
6 ?: T# D1 c, O1 P1 |" o Z4 g公仔箱論壇It only needs to be designed to withstand the weight of the water! 公仔箱論壇- R& i1 c, r+ M" P) t: ~8 c1 Z
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
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The Incredible Magdeburg Water Bridge in Germany
' ]3 [1 ]% w2 WThe 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.
9 i/ H9 a- [/ X" t7 w5.39.217.76The 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. 5.39.217.76- Q, q! B2 s& J% I
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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. $ E/ X. o5 ^3 ^2 |' B0 ^
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' X- X5 y& _- n& F' c1 n+ {公仔箱論壇tvb now,tvbnow,bttvb c$ A$ P" g5 Z/ E# s( h$ ^
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& D* j9 _. i6 w" y5.39.217.76公仔箱論壇5 Z& r4 O. B; X2 m2 G/ l3 N
+ |8 ?0 {& [4 }4 K" T' l- C0 Ztvb now,tvbnow,bttvbTVBNOW 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。4 v0 M: U( A0 b- I8 k8 S
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