本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 公仔箱論壇$ d" l$ H6 ? N+ |6 w
`/ T" e8 f+ e& ]If you are not a Physics person, read on and learn a fact of physics.
5 b. D/ U! R1 T4 [公仔箱論壇AMAZING! 公仔箱論壇% B+ n" h& b6 q D# z1 S
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Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb, s2 H" }6 J+ }* N
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
" F# f H9 e) [) utvb now,tvbnow,bttvbThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
$ X% ^0 x- f5 b& f: yos.tvboxnow.comIt is located in the city of Magdeburg, near Berlin.公仔箱論壇1 _# Y3 @9 M L+ b7 e" n8 _) Y
0 [; r# i3 M0 Q, [6 zThe photo was taken on the day of inauguration.
4 d# A0 y5 M8 Ptvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.7 a5 J) O# T, p/ i7 x% U& Y# J4 W
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Question:tvb now,tvbnow,bttvb9 U! b' y; V6 @( v5 H2 D/ p" |! w
2 L% _! @1 {, ^. F* mtvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
6 ~. B0 `: s9 W7 I. N. X2 G% vOr just the weight of the water? 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。1 k. J2 m2 J& N* ?
1 M7 s( e+ a4 O5 Itvb now,tvbnow,bttvbAnswer:
0 Y- A% c( @' w( V' M! ?) {8 NTVBNOW 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。& {& C9 x" z, w- P! i/ E
It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb. u, c7 R8 s J$ w2 G
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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* u% X/ B; K4 \) I' A: F8 hThe Incredible Magdeburg Water Bridge in Germany
1 {' `8 j2 m1 D# L6 SThe 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.
: q- r6 i) ?0 `) j' wos.tvboxnow.comThe 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。1 k% R" k9 q* ~- O$ J1 D
4 t9 v E" i( H. P# _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。$ F+ h8 b/ i' u7 R2 ? r
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l7 h/ f% n( F1 P7 ~" zTVBNOW 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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