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。6 b8 V) n6 U* @2 @2 p
s! V8 _+ J' R( | T# `tvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics. 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。; u9 O$ ?" r: s$ g9 L
AMAZING! 5.39.217.76# F' A- n& _! A( T# p* @5 G
! M. k& W# c/ h, T) _& ttvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!
: ?& l6 H$ k) Y# ctvb 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。7 S0 h) K& b( V) K2 s; y; D
* g$ \ n7 C6 R4 ~8 y% k: 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* E* l! U+ G, o7 O
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
7 ^0 t! {8 s* c0 N y( }公仔箱論壇It is located in the city of Magdeburg, near Berlin.
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6 B2 {( ~4 d- A公仔箱論壇The photo was taken on the day of inauguration.% ]: D5 p* q0 l1 @& a) Y! H
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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2 h; k6 ]0 M7 [tvb now,tvbnow,bttvbQuestion:tvb now,tvbnow,bttvb# F$ M. l; a ]1 ^6 J0 ]4 ?$ j/ I C; k
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
/ z4 w7 |( V1 r' I) f3 n8 ^* B- @tvb now,tvbnow,bttvbOr just the weight of the water? tvb now,tvbnow,bttvb/ ]! W; R/ I( K4 h' h# V1 @
2 D8 q8 r$ L- l" T0 Dtvb now,tvbnow,bttvbAnswer:5.39.217.765 _# b1 e1 M5 C3 O
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It only needs to be designed to withstand the weight of the water!
5 F. m. S" Q& N/ w4 t0 X; K2 GWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedTVBNOW 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' {3 y$ H' Y3 W! e* H& A) ?5 G
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1 {( P& N( C: i( R4 a公仔箱論壇The Incredible Magdeburg Water Bridge in Germany
- v' z7 R+ z% [3 F- |3 h, uThe 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.tvb now,tvbnow,bttvb6 w3 i1 W% H2 i0 Z! Y
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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3 f A' a8 M/ H7 w9 U$ W ~. ^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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5.39.217.76* y; Y2 V+ A! |3 `9 ~, t; t' j
tvb now,tvbnow,bttvb! T4 Z E/ 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。( @. `4 J4 i# n& W# N- Y# K1 `, A
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。# q# B0 M" [; Z3 {6 b [
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