本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
6 m% A, {: m7 m" k' N/ ttvb now,tvbnow,bttvb
' K1 z( ?: A8 t# n2 Y" q/ b公仔箱論壇If you are not a Physics person, read on and learn a fact of physics. 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。2 h; Q7 O* o* j
AMAZING! tvb now,tvbnow,bttvb& P) S& D0 V2 ?: Z" g, O5 B9 D
0 Q+ p# X' [% i' l; y- e1 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。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。/ f2 L) O& U( v1 H, i
' ^: F/ z- F* e4 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。
8 h4 C+ X, n2 w( UMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5 |# S6 L* \4 A/ O- z! t& @
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 6 b, u6 I$ u4 k. r6 L
It is located in the city of Magdeburg, near Berlin.5.39.217.769 M( @, s4 }) i( J3 B9 e
; E$ b4 Q0 n2 j m# b9 x% `# VThe photo was taken on the day of inauguration.
: z* ^0 a6 q |* ]9 O/ }* ^, k, a/ qTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
! k+ J1 v# I Z# M; 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。0 Z9 f' x9 a8 ?
Question:
, u1 @/ ~+ ~- p) z3 E q$ `- etvb now,tvbnow,bttvb4 C+ A3 C7 o' @6 G0 i
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
; U4 m! j' ]& x- N5.39.217.76Or just the weight of the water? 5 T! ~5 n: j) V5 @: K0 h
+ D, a( h' V2 V- B. V
Answer:
8 w, l6 y$ l# V公仔箱論壇
# z8 B" D! Y& w! B; vIt only needs to be designed to withstand the weight of the water!
+ C9 O% o r4 e! U+ ~公仔箱論壇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( f+ H; |7 T* [( g6 H2 i5 Q5 M
% o1 s4 d' s, _/ e: ]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 \6 ]( Z" e& H( M+ e0 P
The Incredible Magdeburg Water Bridge in Germanytvb now,tvbnow,bttvb, y3 b; W) n9 l
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.
2 W' X+ ^/ c( rThe 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.
2 ^, }) z' c2 n" G- 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。2 {- m# U1 b/ M" `5 o. W
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.
7 u* `3 }! I' D0 V# ?公仔箱論壇tvb now,tvbnow,bttvb. k( }6 C3 X7 M- z5 T1 u! X7 o8 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。( }) ?5 U/ [! \, ~4 @
tvb now,tvbnow,bttvb& I! m, u& _/ f3 u1 k3 w6 X( e$ u0 ]
( r% q3 m: Y8 q$ _0 [' utvb now,tvbnow,bttvb2 W1 w7 Y0 l# p# [7 n5 W: Q% @& ?
tvb now,tvbnow,bttvb5 V: {9 U+ A9 `, r# b" p! ~
; Y2 E/ J3 x2 M- V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。5 ^3 Z3 i0 u- e7 I
* h- I# |4 @! x% r& I( 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。 |
發表於 2011-10-2 10:09 PM
| 
發表於 2011-10-4 11:33 AM
| 
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。# M0 [; W) C- S/ E, L( ?+ v) \
發表於 2011-10-15 09:35 PM
|