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Automatic Windshield Wipers

A caller on an automotive-themed radio program asked for help with a problem. It seems that when it rained her windshield wipers sometimes turned themselves on. How is this possible?

Author(s):
Evan M. Manning
Date Accepted: 1998-03-12 Grade Group: Middle School (6-8) Benchmarks: S13.4.1 Keywords: conduction conductivity electricity water ion wire battery motor Microsoft Word: 12_29_97_2.docx PDF Document: 12_29_97_2.pdf