A power source that includes a zinc nail, a copper …
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Photo by Rami Daud | published: February 23, 2011

A power source that includes a zinc nail, a copper penny and two oranges and two lemons that generated enough power to light a low-energy diode is the project that Walter Woods, 10, will present at the upcoming science fair at Youngstown State University. The McGuffey School fifth-grader is shown here during a session of the after-school science program at West Side Community Center.