February 21, 2017

Homework Help: Physics

Posted by Tiffany on Thursday, February 7, 2013 at 2:56pm.

At some automobile toll-collecting stations, a
thin metal wire sticks up from the road and
makes contact with cars before they reach the
toll collector.
What is the purpose of this wire?
1. To warn the drivers
2. To count the vehicles
3. To transfer positive particles to the automobile
4. To discharge the automobile
5. To transfer electrons to the automobile

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