本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb7 A4 D& {( }0 z4 E( ~
. P) Q* s2 V' \: T* ]. N' PTVBNOW 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.
/ w7 m; V! z/ m1 G% ^4 M- V8 W. U公仔箱論壇AMAZING!
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Even after you see it, it is still hard to believe!% s! b- d+ C+ A0 N( L; V
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
+ }1 N6 o4 i4 c) ?; B2 B/ b, t# B5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
8 S O% o: \$ l, Q" [; ?! F3 `' XIt is located in the city of Magdeburg, near Berlin.
7 r) A5 E, m/ b公仔箱論壇tvb now,tvbnow,bttvb+ I# a6 K3 J8 h- L9 }8 G
The photo was taken on the day of inauguration.
* j/ v- d1 U5 q- [; y公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇: W4 }8 o3 r- l1 w. W
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。, Y3 y8 C7 U' B0 T k, ^; \/ v/ Z
Question:
! j6 X. y+ r5 U3 J+ Y+ _0 TTVBNOW 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。
3 `9 ^! t5 B9 |% G$ i2 r) S; Y5.39.217.76Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,& K: f- d. u+ w0 t) E- {
Or just the weight of the water?
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" f* H4 r9 E: ^# `# q5.39.217.76Answer:
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It only needs to be designed to withstand the weight of the water!
% u2 X- {4 M! f l, y9 Q; \5.39.217.76Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
0 E! ^) ~; q6 @& G4 p8 QTVBNOW 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。0 t$ n1 X4 f+ J* [& p0 p! [
8 F. q; q( V) PThe Incredible Magdeburg Water Bridge in Germany公仔箱論壇" A8 E S( B4 `) A. m' e, ]+ x" S
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.
7 l& E) Z8 ?% ~, J9 f* l8 ?0 H公仔箱論壇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.
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: I% l3 }" S" o4 l. F# K1 |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' M8 H$ f5 c% ^
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: ~9 I: I9 P, f/ GTVBNOW 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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