本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 " F C4 `! T/ z- k/ z) b! p6 x, I8 y
. X X$ x6 U. q% R* m5.39.217.77:8898If you are not a Physics person, read on and learn a fact of physics. ' `# e4 V M7 C9 _+ j
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。8 b( i- H; L8 \/ S6 W2 R% F+ a
; ~3 m- D \) ~; t4 H& ttvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!5.39.217.77:88980 ?" Z6 f& A7 I; g" b8 d" v! c j
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# `6 @6 J' F; v* T0 e3 r. I3 D* a) ZMagdeburg 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。- l V0 Q& j3 t0 p: U
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* z+ W, V$ t( z2 `
It is located in the city of Magdeburg, near Berlin.: e8 Y. r$ \; F- t# G; x
; l. m4 J: P9 R& h- s, 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。The photo was taken on the day of inauguration.4 |0 h* u1 T5 l
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.9 t8 k1 F# b' B7 t; X, e% E9 ^: A
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Question:
& w. K. y9 G" s" R$ eTVBNOW 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。
& s$ z& B3 p- {( o# j公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
: U0 w. {9 U R% D) g# e: G. W. Ttvb now,tvbnow,bttvbOr just the weight of the water? ; V4 y! z* K- T$ \* T7 Q
0 n7 I! f: R% @2 _* f0 H$ e5 e' Atvb now,tvbnow,bttvbAnswer:
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) `$ {6 W1 J1 h' I$ l5.39.217.77:8898It only needs to be designed to withstand the weight of the water!
7 M. t7 E! I7 F, B# @: e. \* Wtvb now,tvbnow,bttvbWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
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+ g7 \8 ~: H+ w9 {5.39.217.77:8898The Incredible Magdeburg Water Bridge in Germany" d6 G- d6 Y% R! k" [( e& A* x
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.
+ D# L# S Z; }! u: PThe 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. 5.39.217.77:8898: c+ j! o3 f/ S4 W: I, Z7 m
1 D: ~# }: u6 \; z- N$ Itvb now,tvbnow,bttvbConstruction 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. 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。* L# ~2 W+ G, B! E8 h- E% U
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。+ o3 u5 t% C0 P+ }& W: N
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; M& d8 E: w" L" o; w公仔箱論壇
5 `& e {* u: m) u8 R! z. ?; r5.39.217.77:8898公仔箱論壇9 @5 P. ^: R8 N) e# a7 i- S0 B; [6 M
8 w9 ?' ?0 J9 ^! q* W公仔箱論壇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。/ s K( y8 k! [/ q; F2 p
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