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。' e) M( q' O5 c* Y$ x8 ]$ J4 u
) T4 w0 c: G( \7 z: o8 h5.39.217.76If you are not a Physics person, read on and learn a fact of physics. 8 n+ P% b+ G* @. V
AMAZING! ! J) f. h, O9 u1 X; {3 s6 @+ W* @
7 M3 r; J( w, h' o% }( u( P& P. I. PEven after you see it, it is still hard to believe!
& [" g( J- M8 _. ]2 ~3 ^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。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。* P$ Y, k- A' ]- s( b0 i( X! {: m! H6 o
h7 ` s" k( m6 O* _4 k5 JMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 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+ u8 T: F! L. b( S# ?$ R
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. ( N5 L: x' A& Q; R( }9 i
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb1 b$ D9 W" g+ j: \, y8 Y
" K G/ ^2 U, ^, w公仔箱論壇The photo was taken on the day of inauguration.
. _' r! A: Z# U+ Ltvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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; S+ V* F0 U5 t4 D; {/ ^5 h: Z) LQuestion:
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% w' e' k; T: j5 o5 ?. Etvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb; k& Z0 |+ i$ K' O- |
Or just the weight of the water? tvb now,tvbnow,bttvb# N' g: b% L$ a8 y8 }- s4 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。! A$ ?0 w4 i% P: l8 e& `% P, x0 `
Answer:
' S! M$ Y1 O3 l# ITVBNOW 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。公仔箱論壇) j0 \, X0 u' f) a
It only needs to be designed to withstand the weight of the water! * C9 v' @. K$ T8 g* n6 [! ?/ 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 loaded公仔箱論壇9 `$ f P0 C5 Q0 x" Z1 f5 B$ v
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The Incredible Magdeburg Water Bridge in Germany
3 e: `/ j3 @ h6 d$ `8 s3 e# h3 l5.39.217.76The 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.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。; m0 E# E- }2 w; P4 P7 r
The 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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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. 8 ^( p* n( j h# ^$ g! e5 H8 w) L
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# m D" R! t9 m e3 h9 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。
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& P, m* E. V# m, Z! f# t: q' K4 `* Wtvb now,tvbnow,bttvb5.39.217.767 Q0 L' w$ a3 I# ^5 f9 C
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