本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics.
, {* Q+ h- { J) r2 n% ?2 VAMAZING! 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。4 D; r6 w9 J( c
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Even after you see it, it is still hard to believe!公仔箱論壇! r1 n+ Y$ ]0 x2 w
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. `4 H& P) H6 _" }: CMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
( Q2 z3 o1 o% B8 p; j" t9 o1 lTVBNOW 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。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* H: e5 i% a# h) }8 c
It is located in the city of Magdeburg, near Berlin." m6 }+ n' F1 L# }
, i* \, h0 ~8 u* D7 G# W8 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。The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb+ N. t5 x: p1 P0 \9 X$ m. y
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.76. j% g3 y" K5 s2 u: u8 ?4 E
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Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.767 s2 j+ l4 }7 r. a
Or just the weight of the water?
, |# l% {- u: h; R7 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。
0 l9 l' ]$ W; q2 v- _# V0 a: 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。Answer:tvb now,tvbnow,bttvb7 D/ y& |( [" x2 U4 B
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* {/ P+ `1 K
It only needs to be designed to withstand the weight of the water! # ?) C1 N! @% V. J
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedtvb now,tvbnow,bttvb, s4 `1 z: ~# P ^# A5 {% R+ t
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+ y9 n7 ?, E" s2 r3 W7 _: {The Incredible Magdeburg Water Bridge in Germany) G+ p3 Z0 L6 L) |. E5 n
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.
/ k& v+ A0 T& k9 q$ P. |& A5.39.217.76The 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. tvb now,tvbnow,bttvb+ P* Q$ x& f: D
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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.
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