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A Moment of Science

Posts tagged speeding car

September 27, 2003

 

Ear-friendly Train Tunnels

The most famous tunnel is the thirty mile “Chunnel” between England and France. Thirty miles of air is a lot to push around, so engineers have come up with a clever solution. The Chunnel is actually two separate tunnels, connected by cross passages.

September 27, 2003

 

Laser Gun

But the farther away the gun is, the wider the beam gets spread so that only a small fraction of the total light power can go into anyone’s eye.

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