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Physics 12 Online
OpenStudy (anonymous):

Which of the following is not harmed by acid rain? concrete buildings glass windows marble statues iron railroad tracks

OpenStudy (anonymous):

Which of the following helps to maintain the temperature of the planet by absorbing infrared energy? water atmosphere soil all of the above

OpenStudy (anonymous):

What is the name of the scientist who discovered that all elements have a unique spectrum? Bohr Kepler Copernicus Ptolemy

OpenStudy (aaronq):

glass windows

OpenStudy (anonymous):

what about the other two

OpenStudy (anonymous):

@aaronq

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