本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
& B* n$ N6 z" W5 Y5 n0 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。
! K3 F4 s: o: h" b6 y) n公仔箱論壇If you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb, d% b; T8 ]4 F, B8 Y8 g
AMAZING! 5.39.217.762 T- G; I! b" F5 u
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Even after you see it, it is still hard to believe!
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: G5 Z2 a; t* H% j- ytvb now,tvbnow,bttvbMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
' U. n: N" C# I4 D) t/ v公仔箱論壇This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
/ X6 L- V0 e8 V- _7 t gtvb now,tvbnow,bttvbIt is located in the city of Magdeburg, near Berlin.
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6 I' a5 I$ e$ B' Q! S/ r. B$ pThe photo was taken on the day of inauguration.公仔箱論壇6 ] t o6 `! q. w) y/ f, | N9 E
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:公仔箱論壇 F% j; Q4 D" R5 ?
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
4 d! G9 Q* N" a5.39.217.76Or just the weight of the water?
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Answer:
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- u- n; v2 t$ f/ i# a' x( u9 UIt only needs to be designed to withstand the weight of the water! 公仔箱論壇6 g+ A$ F$ q! I( d
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedtvb now,tvbnow,bttvb5 C$ i2 |0 n) j" k- S3 F
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The Incredible Magdeburg Water Bridge in Germany
4 d: C4 ? J& O8 TThe 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.
0 x% ?( F S' w0 N; L, \4 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. tvb now,tvbnow,bttvb, `+ z$ Q' m$ i
8 X7 f/ P8 }3 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。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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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。( c) `' B9 P8 E# @- 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。! K0 ?, w; P- x4 I ?
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