本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics. 5.39.217.76* I- Y: \; A% I, K
AMAZING!
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3 M* Q: W$ |2 I* NTVBNOW 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。Even after you see it, it is still hard to believe!公仔箱論壇! s+ |; m9 w% Q5 @# @$ ?
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb6 F- p6 ]2 L* c8 G& |( C5 `
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 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。5 }. U1 ~! }* k$ J# ?6 b
It is located in the city of Magdeburg, near Berlin.) r" W/ U! E+ l% a2 J
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The photo was taken on the day of inauguration.5.39.217.76, ?/ s& \: P: k @9 q3 R
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.tvb now,tvbnow,bttvb6 {& N( M% p3 |
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。5 N1 F( b% z0 J( g$ f: K% l
Question:
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- s# i7 ?' K7 j" t# P1 |Did that bridge have to be designed to withstand the additional weight of ship and barge traffic, v/ \4 d9 s9 m' }, i1 @' Z7 G! B$ @
Or just the weight of the water? 5.39.217.76; l0 S. T8 M! l+ w8 r( {+ V
8 S( y5 K+ o7 o6 h! Ytvb now,tvbnow,bttvbAnswer:公仔箱論壇/ w! |9 ?) [1 X( T/ s0 h
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It only needs to be designed to withstand the weight of the water! ; d+ \$ m. g6 v4 [1 m 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 loaded) {) P8 W, p; I9 p! n
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6 U2 W( H4 [6 s5 X% S! [, G( H' F公仔箱論壇The Incredible Magdeburg Water Bridge in Germanytvb now,tvbnow,bttvb; {& H4 z/ P8 y! ]% g* y, g4 T
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.
+ n# I- x) Y1 T( g3 f& {8 P5.39.217.76The 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. 2 b% c7 S8 ~# M; Z) c' Q
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" ?/ L# x% G5 \+ s. {0 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。5.39.217.765 l ~" a o3 v- w% T, a: R
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