本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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- e! }* o/ a6 N# n8 w! r' G4 ~tvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics. ( }' B1 A* u8 N6 D2 z
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。+ S2 U5 V, r1 F3 g. L7 h
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Even after you see it, it is still hard to believe!
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1 c+ h8 a2 U" j) `- D5.39.217.77:8898Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
( \" r" z/ D1 u2 Ttvb 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.
! }) \, u. R8 V `8 q, _It is located in the city of Magdeburg, near Berlin./ x& j$ C- E( x8 G8 C: @' a
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The photo was taken on the day of inauguration.
4 R8 x* I/ v. z6 R4 U$ L3 W' W, ~To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.77:8898$ `/ [2 C4 |# e% i* \
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Question:
& i, m! r8 x" ^$ |$ C$ B5 o5 BTVBNOW 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。5.39.217.77:8898: z& R* ~& v2 Y
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb! c- O# y+ {( b$ G4 R
Or just the weight of the water?
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' a6 _. k1 M) m0 k( i* V: u* I+ _公仔箱論壇Answer:
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It only needs to be designed to withstand the weight of the water! 5.39.217.77:8898. d$ I! a4 N" e( ~
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( _8 `% l w; R& r7 ~* v! {9 w
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The Incredible Magdeburg Water Bridge in Germanytvb now,tvbnow,bttvb! t2 e8 q5 |0 i
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.
& C) _1 u# p4 F6 {3 X8 S3 c! J1 E( ytvb now,tvbnow,bttvbThe 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. # o! M6 I9 X" j9 G- e A: F4 { q7 F
( p2 Z! J. ~* @# ~4 V1 qConstruction 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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+ e5 }" a7 @% X* e/ V. p( e5.39.217.77:8898tvb now,tvbnow,bttvb% c$ A) Z, D* o0 G
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 N- S9 v; @2 |7 V, g! |
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