本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
* M" }1 R/ s3 P/ L6 \6 _0 s2 i$ otvb now,tvbnow,bttvb$ e# V/ _; ]! V* [
If you are not a Physics person, read on and learn a fact of physics.
& m8 e' W) l8 T7 m( y公仔箱論壇AMAZING!
. r _" c @% k5 v3 _公仔箱論壇公仔箱論壇% Y1 M f# i* x7 ^2 C+ y
Even after you see it, it is still hard to believe!公仔箱論壇5 e5 d- d- \9 @6 k) r2 p
% k# R9 I. M; c+ n7 q+ M3 Etvb now,tvbnow,bttvbTVBNOW 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。- }) H' h% F- L
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! & q. j/ j- P5 \
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. : W, {1 D: o; F* M7 G: l
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb# t( Z1 o* F, s; ^$ ~9 I1 G/ C' Q5 D* \
8 E# f6 d3 `* b2 U3 u! R" G7 ]The photo was taken on the day of inauguration.
3 H T; n1 m1 Z" y9 n8 otvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
+ l0 \2 a8 A, e7 l5.39.217.77
4 p/ O. m& ]/ p0 K/ V/ t$ C! _tvb now,tvbnow,bttvbQuestion:
3 O# }, s3 e6 [7 H5 O2 I' X7 K5.39.217.77
7 ^& f* s4 _5 j1 a7 S6 c5 l1 X公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,1 f2 i. _: Y: x* J F
Or just the weight of the water? 公仔箱論壇, N! i* ]' O) F5 j$ z
5.39.217.77! D3 }4 h7 `% a l+ n
Answer:
! E: d8 @( J3 f公仔箱論壇
F' p' Z& `; c- u; j公仔箱論壇It only needs to be designed to withstand the weight of the water! 8 B( {! Y. I0 H; R0 M: c
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 n) X' ]; H) u' a
8 u4 c0 I) C% S3 c( Z' |+ b0 j' t$ r
The Incredible Magdeburg Water Bridge in Germany$ O, R, |9 S2 Y9 N+ G4 p1 r
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.
; c2 S! a/ E. r* NThe 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. 5.39.217.77' E- r! |! y5 G; L
: C6 G( J& h) `( D: Q2 A* ~( MConstruction 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.
( o% D# U/ v# p7 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。tvb now,tvbnow,bttvb; [2 ^3 p" Y% e3 ]" S" d' Q
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。 e# n, {' d3 j# ~" }6 x) A9 G, D
4 I% ^) o" t2 t; S P
( z9 u" W' J! I
) D- m3 D! {) X: N/ v; [5 p7 T
& ?- a, r) o% X6 I% M- X/ 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。
+ k6 W" P. b; T& u
, g3 w3 v. X; Y公仔箱論壇 |
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
|