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Physics 17 Online
OpenStudy (anonymous):

Which waves are mechanical waves? A. microwaves B. sound waves C. radio waves D. light waves http://static.k12.com/calms_media/media/1141000_1141500/1141264/1/470f96596bf7b74363c4204125d3ed6bace30f8f/MS2_PHY_07_10_assess_04_ILL_wave.jpg

OpenStudy (anonymous):

@mathsciencehistory

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