本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb/ N5 M" {9 ]0 P: T, m
, {, m! b9 k3 c: |If you are not a Physics person, read on and learn a fact of physics. ' X% c2 F# W$ Z; g2 D( T
AMAZING! tvb now,tvbnow,bttvb( \/ D- |" f* P( G$ A
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 Z# w) P: N' _, A% ~3 O6 K& _) v
Even after you see it, it is still hard to believe!
. D* j1 V- Y8 Q2 J公仔箱論壇
; O0 g7 ~2 V2 d. X公仔箱論壇
/ I7 ^. h4 R! f- ~, j A ]Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 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 h+ ]/ M( _# ?6 T' D+ _
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 公仔箱論壇 k! t/ d3 b: |; ^: i# y I
It is located in the city of Magdeburg, near Berlin.6 ]+ a% T2 C* ~( B
公仔箱論壇( T% u/ P2 G: P$ g% y/ M! d
The photo was taken on the day of inauguration.
# s- [0 _9 Z2 f4 o; \5 yTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
/ @+ V: `% V/ Z" P6 {% } P# B9 m2 Z/ L! w* o, s* ]( J, \
Question:
5 v+ N; I$ a% Y$ ]公仔箱論壇
1 P9 t# Z' D) J% R" d% UDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,/ { J3 p4 k3 X7 d
Or just the weight of the water?
# ` D$ t( O8 v5 Z( `7 d: s& d7 t8 g/ r公仔箱論壇
1 Q( X. k0 r; J5 E- A6 o公仔箱論壇Answer:公仔箱論壇% s1 O6 _5 q# Y0 Z
公仔箱論壇2 h; W) O& v4 r( G3 y7 e
It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb$ L" z0 H" H1 T) Q' \( h$ _; L# j
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded5.39.217.765 w2 a% w$ q1 h* e, I( |( E
8 |5 S8 I* R- U* h- O6 n, W7 z9 M5.39.217.76
9 f# e9 C$ |6 o' I2 A5.39.217.76The Incredible Magdeburg Water Bridge in Germany
( Y9 M" E# \+ c) D, }* R0 `公仔箱論壇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.5.39.217.769 B6 |* g4 `% [; ?* 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.
6 `* Z0 n# E. v7 x. @" mtvb now,tvbnow,bttvb0 E! G* _' ~7 ^- y! b
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. - i$ s, B1 g( R |" |
6 h% n( t k3 b! J( l7 x* z. h公仔箱論壇. L/ J$ x' W, y. q4 Q0 F
5.39.217.76, x7 V) x0 N+ q9 B1 t, T% m" t$ Y; V
1 h3 J# U( t+ m6 R9 _/ S; ]& ?, q
3 f9 }4 l. r u: v1 j/ {5.39.217.76TVBNOW 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 z! ]0 n9 d# g+ p
+ Q4 a, y+ O8 u9 Z3 A( m2 I2 utvb now,tvbnow,bttvb
9 K+ n p' ]- n. o5.39.217.76! I6 u. e9 _' H( L) u
|
發表於 2011-10-2 10:09 PM
| 
發表於 2011-10-4 11:33 AM
| 
" D( O8 E# D5 Y& M& ]& x) p
發表於 2011-10-15 09:35 PM
|