本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.76/ N& {0 \, Y4 d1 C
5.39.217.763 X3 o4 C+ Y. G
If you are not a Physics person, read on and learn a fact of physics.
, \4 U n. n2 W公仔箱論壇AMAZING! 5.39.217.76: l3 j% m2 r3 [& x& x# z7 G
( K m5 Q) W8 n2 [# r5.39.217.76Even after you see it, it is still hard to believe!
+ ^3 j% W \( m3 ?' i5.39.217.76. D( i" `0 ]7 @: |2 P/ K( z2 T$ A) C
" F$ |4 Z- @5 u3 F. M( l
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
* d3 \: b- ~1 yTVBNOW 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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
, `" q* f# X" F4 O4 o/ m5 O5.39.217.76It is located in the city of Magdeburg, near Berlin.
' W5 {4 B2 X3 p$ d; n
& T2 @# n. C5 qTVBNOW 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 photo was taken on the day of inauguration.
8 s8 f; C" R* K9 C0 I3 c, `1 f; Z6 E公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
8 }# R; j; w" ?" M6 k$ Vtvb now,tvbnow,bttvb9 }/ m0 y5 t- u) t! v- U9 z
Question:
! [+ @0 L9 P! ~+ W; 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。* \3 B H: y2 ^0 G
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
. h7 n9 k+ Y- I) p/ a5 B% 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。Or just the weight of the water?
9 j/ Q# l7 K- L. A- Y: h9 L/ j ttvb now,tvbnow,bttvb5.39.217.76+ r0 f7 o3 a" R' E* a4 z
Answer:
$ Q) j& G) q8 d2 n' P5 \ y0 w- W
It only needs to be designed to withstand the weight of the water!
. i- R! i4 J/ o! g7 X1 b+ n5.39.217.76Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
2 \; v/ |- m: r& `% yTVBNOW 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 c3 Q" u9 r' ]
, d3 A0 K( `% V+ m: r- ]/ U, hThe Incredible Magdeburg Water Bridge in Germany
2 @* M6 e+ Z2 p1 o6 @* n( ]5.39.217.76The 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.: J# a% X4 A$ b
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. ' n$ @( a% ]8 B# \5 N. ^/ R; r
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。. ~- p, u7 p& ?, V, K
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. ! Y% ]* U( p- h3 F7 C3 n
/ g! v ~9 j0 y, _tvb now,tvbnow,bttvb, H5 T1 M; g) B/ S
w6 ~) _, N/ ~1 ]) x6 o/ v+ i
: ]7 w* [9 [2 S1 U" i6 HTVBNOW 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。tvb now,tvbnow,bttvb/ E; V' ~* m+ a6 ^$ {
tvb now,tvbnow,bttvb# T: O. ?+ `& U0 ?7 P( \! H( j
5.39.217.76+ n- X/ e* T5 C+ D$ m! O* Y
& g. b, n- Z% k; y$ r0 z0 @( D
公仔箱論壇" E. z5 O/ A0 u$ q, s$ ?7 q$ F
|
發表於 2011-10-2 10:09 PM
| 
發表於 2011-10-4 11:33 AM
| 
發表於 2011-10-15 09:35 PM
|