четверг, 28 апреля 2016 г.

The Incredible Magdeburg Water Bridge in Germany

ABSOLUTELY INCREDIBLE 


If you are not a Physics person, read the last paragraph and learn a fact of physics. 
Have you ever seen a river over a river? AMAZING !!! 



Even after you see it, it is still hard to believe! 
Water Bridge in Germany . What a feat! 
Six years, 500 million Euros, 918 meters long . . . now this is engineering! 

This is a channel-bridge over the River Elbe and joins the former East and West Germany , 
As part of the unification project. It is located in the city of Magdeburg,near Berlin . 
The photo was taken on the day of inauguration. 

To those who appreciate engineering projects, here's a puzzle for your armchair engineers 
. . . and physicists. 

Question: 

Did that bridge have to be designed to withstand the additional weight of ship and barge traffic, 
Or just the weight of the water? 

Answer: 

the answer will appear at the end of this email, I moved it to give you time to 
think about it. 


Saturday, April 23, 2011 
The Incredible Magdeburg Water Bridge in Germany 
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. 
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. 

Construction of the water link was started as early as in the 1930's 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. 










ANSWER: 
It only needs to be designed to withstand the weight of the water! 

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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