本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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" F2 m' M( \: I* LIf 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。- ?9 Q8 C: u3 ?8 q$ o6 E) J; `
AMAZING! 公仔箱論壇9 \, \' v7 D, _* |0 ]
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Even after you see it, it is still hard to believe!5 q( P$ A' e6 }
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* }5 @; a. r4 zMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
8 c/ x. j# X3 b; A9 L, n; AThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5.39.217.76, ]7 Y6 Y1 \/ Q' s! i
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb K5 w \5 d5 S' i! n
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The photo was taken on the day of inauguration.
7 Z3 o0 E$ c; _, ^9 W, |公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
) x. z( [3 y5 p7 A( y. 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。5.39.217.76! G, b+ @) x" u: O+ d# X
Question:, v$ R, ~# D5 d& \9 p" k4 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。( s6 Z. {: `+ }8 A+ ]: C# q
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
6 M+ b8 `7 Q- Z; o& uOr just the weight of the water?
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% \# U0 [4 u; e6 oAnswer:5.39.217.76* D+ o; H# e+ y1 T" \' [
1 v% `/ W e9 o0 |( V; ?2 b5.39.217.76It only needs to be designed to withstand the weight of the water!
- i8 m* X) ]+ K% w) [. ?; b5.39.217.76Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
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The Incredible Magdeburg Water Bridge in GermanyTVBNOW 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 @0 w5 ~2 Y! V5 _% ]( i7 N) |
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.+ C& U9 V# J# O" a
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. ^) {, f" q- U. l1 y+ K# _
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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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- Q9 _( N0 t8 H$ C公仔箱論壇5.39.217.766 A+ e$ Y! A7 K3 Y+ R+ ^
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