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Bridges
Beginning of essay
REASEARCH PAPER have been around sense the beginning of time. The Ancient Roman engineers used two significant innovations, the cofferdam and cement. The cofferdam is when the put wooden spikes in to the bottom of the river then used watertight clay over the spikes to make a bridge. Now today ther ....
Middle of essay
....cks of the bridge are designed as special curves so that wind flows across them as easily as over a plane. The bridge has a central span of 2,800 feet. The span is so long that it has been built with a slight upward curve from end to end, to accommodate the effects of the curvature of the Earth. There are also huge cables that have to suspend the bridge in the air. If a bubble collides with another bubble, the result always ends up in a sharing unison. Regardless of there size, no matter what, t.... |
| Number of words: 506 |
Approximate pages: 2 |
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