本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 % y% z8 C* t z# f
7 Q L6 O( ?+ d$ X) @. e; v J! _4 bTVBNOW 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. 5.39.217.76* |" c! ~- u P$ T
AMAZING! tvb now,tvbnow,bttvb! h0 y) \1 ^1 m/ I5 z j
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Even after you see it, it is still hard to believe!
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4 t9 R4 N* \% h, G4 ^) STVBNOW 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。5.39.217.769 N: W$ u7 M# ?- ^, e$ O
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇8 y8 \* R) [2 V( M
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. " R. z" x! N2 R# u2 ?
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
- m: ^6 @3 m$ X) o% w7 ~. k% ?, B5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
' t; ]6 U) S2 q2 {! N8 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。
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
, W% |9 y. a% I5 v' a8 O2 z- fOr just the weight of the water? 5.39.217.76/ D& |% o, r8 \$ N Y8 ]" K4 q
4 A6 U, s3 R4 d0 w9 D! B. P0 j公仔箱論壇Answer:
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It only needs to be designed to withstand the weight of the water!
! i W v( ~" g7 yTVBNOW 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。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
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9 R! b1 N* h. `! n5.39.217.76The Incredible Magdeburg Water Bridge in Germany5.39.217.76- P K1 P9 |; ~" ]4 Q* `; W
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.
6 \% D1 g: c* z2 B" m! H' A5.39.217.76The 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. 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。$ o. m$ P- s. ~ w! }7 o
) P; _ ?0 ]& i8 ?: q5.39.217.76Construction 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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0 ?2 t' _# t& ]( i% |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。8 x0 \ B9 X. ]( @5 r
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