本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb; _( ^6 n( H: M5 H9 f' t
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If you are not a Physics person, read on and learn a fact of physics. 4 U8 w b1 [0 m3 B0 H5 w* }
AMAZING! 5 B$ L9 q$ W% l$ l# `/ l3 \7 _
0 o4 m8 | t4 N% ^# h0 Z公仔箱論壇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。0 t6 o: Q" v0 L
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% V. l) F7 [5 [Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
. J W( [/ s; ?9 iThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 9 k$ C- E7 S+ U# j% l! E/ l, O
It is located in the city of Magdeburg, near Berlin.- z0 R7 x% J1 S% M$ e
% D6 z9 V, ^% e p' p% a# ?: C5 Q" Wwww.tvboxnow.comThe photo was taken on the day of inauguration.. B# T1 q" v. f, x% @
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.www.tvboxnow.com4 t4 {6 C! J; |. I
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Question:公仔箱論壇) h5 ?, H+ B) d0 `4 u- p1 o
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
/ d& a9 z9 G! X% \9 K6 n9 P9 xtvb now,tvbnow,bttvbOr just the weight of the water?
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- b3 x0 Z+ Q5 ~9 E, G1 _* V7 {) zAnswer:
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2 {9 o$ l3 F1 Q0 r2 FIt only needs to be designed to withstand the weight of the water! 0 P+ K. O, o& T9 h# t
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,bttvb8 p8 H0 I2 G8 M7 ~9 W! B8 N
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1 I( }, _! g# A, `2 itvb now,tvbnow,bttvbThe Incredible Magdeburg Water Bridge in Germany
' o0 c( C* A. ]7 B: \www.tvboxnow.comThe 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.公仔箱論壇$ O0 {; ~7 \3 c0 w
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. 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。6 q$ N a$ |* Y
/ m9 E) [( T8 e0 {" ywww.tvboxnow.comConstruction 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. c1 J' v; Q% b" j; C
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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。( G; w6 B, A* |
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