Water Bridge

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    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 you armchair engineers and physicists. Did that bridge have to be designed to withstand the additional weight of ship and barge traffic, or just the weight of the water?


    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.

    Remember your high school physics, and the fly in an enclosed bottle project? Similarly, the super sensitive scale proved that it didn't make any difference whether the fly was sitting on the bottom, walking up the side, or flying around. The bottle, air, and fly were a single unit of mass and always weighed the same.

    mambo1935, Heather / momzilla_ca, and 10 other people added this photo to their favorites.

    1. Towboat Garage 57 months ago | reply

      just received the same image in an e-mail including the text-
      went to flickr to see more shots- simply amazing. thanks for posting it

    2. Waterkeeper Alliance Online Editor 38 months ago | reply

      I run a group called 'Water & Urbanization' for Waterkeeper Alliance (an environmental nonprofit). The group is working to promote the U.N.'s World Water Day (March 22) which has taken water and urbanization as its theme this year. Your shot would be ideal for the group. Hope you will consider a submission. www.flickr.com/groups/urbanwater/

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