本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.76+ I! l9 N1 g3 C; o0 s
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If you are not a Physics person, read on and learn a fact of physics.
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1 m# G! X6 h! S4 f( d0 LTVBNOW 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。- \; Q* x, l, @
Even after you see it, it is still hard to believe!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。# i) { x+ \( S6 ^/ H
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5.39.217.76# t/ h `( i2 d2 K1 L
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. % Y& ?* p" |3 v5 a% X! C9 y
It is located in the city of Magdeburg, near Berlin.
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# v( H" I9 x+ h8 o9 J$ r2 nThe photo was taken on the day of inauguration.
- Q! W* _- \3 O5 L$ i5 B, @2 o; Rtvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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。, v! p6 g$ R) u8 s$ ?
2 \9 C% l9 n/ z }4 CQuestion:
/ E: Q( _+ W2 {" R/ l8 ctvb now,tvbnow,bttvbTVBNOW 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。 b( K) J$ [+ W: A! K0 f
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,6 O! Y7 |" q& R/ E
Or just the weight of the water?
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Answer:; u8 u* k. q8 t; B/ M
- K- z* S9 Z9 w1 ^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。It only needs to be designed to withstand the weight of the water! 5.39.217.76, H" m0 ]3 z5 W0 g8 v
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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$ d- Y6 @: U% F3 D. D1 h* [The Incredible Magdeburg Water Bridge in Germany
2 U7 H! ^( D" Q9 K' ~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。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.
: n9 Y3 g# K- }/ D% f$ z' {7 h4 XThe 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. 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 ?* B: \' c3 K9 K" |2 U
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+ ~+ j; f# W# a8 i2 d% n. y* Etvb now,tvbnow,bttvb5.39.217.765 F6 k, y' }) a# R( x! H% w4 h: I
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