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Physics, 08.07.2019 05:00 sneakypanther19

Anew statue of the town founder is erected in the park.  at the unveiling, the statue is a orange-brown copper.  after a year, the statue looks blue-green.  has a physical or chemical change taken place?

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Anew statue of the town founder is erected in the park.  at the unveiling, the statue is a ora...

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