本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb* O7 `, k- U+ W% m, p5 ^
9 ~% F& {# C: J/ S. I2 c- JTVBNOW 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。If you are not a Physics person, read on and learn a fact of physics.
" [% e& n' @1 t" E) Ttvb now,tvbnow,bttvbAMAZING!
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% [1 ~0 q! O, ]公仔箱論壇Even after you see it, it is still hard to believe!
& W: f' m" j- g- n' C f* STVBNOW 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。
" O7 e! N: v! STVBNOW 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 x6 n, j$ n. T1 |+ y) yMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
0 L) ^9 u" |) V/ ~tvb 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. # U3 b8 ~1 H, V2 H5 V
It is located in the city of Magdeburg, near Berlin.
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, g, R* p- D% r+ YThe photo was taken on the day of inauguration.tvb now,tvbnow,bttvb7 z# H# D, G- c n) z; o1 I
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.9 Y6 {) e9 c' W. k
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Question:
8 e0 c) S) x6 s, F2 h! o公仔箱論壇
6 t; ]+ z( c; p; V# 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。Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,8 i9 f$ r2 Y3 ]1 ^) i- r/ `% D) _
Or just the weight of the water?
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( L1 x" x2 E3 M7 vAnswer:
; {7 j+ S4 [9 x) j4 M; k2 r( z0 WTVBNOW 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 y5 O- o& Z3 v- q公仔箱論壇It only needs to be designed to withstand the weight of the water! ' `% H) R; R# \! X5 s; @
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded5.39.217.766 A' c R3 m1 ^' ^: @& U* L1 T. ?' O
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The Incredible Magdeburg Water Bridge in Germany公仔箱論壇# z0 \4 `" D. b8 ?
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.
8 _, Z+ v4 a- [8 R8 x0 a( kThe 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.
9 I U1 m4 i9 l* h$ }4 _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。# Q1 N, A U% i/ A& h+ `0 l
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. tvb now,tvbnow,bttvb/ ^/ @! l# p G- w1 v
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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。/ T, u( ^/ M+ {, a i
tvb now,tvbnow,bttvb. I, X( A! V4 e [
5.39.217.76: j( @8 `" ^+ g8 s' b. 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。$ m+ Q% D. C: _/ g) D9 j/ j5 k9 r0 M
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。" m d: {& y. V F8 y% B, K( w
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