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Chemistry, 23.06.2019 10:30
How is it possible for someone to put an ear to a wall and hear someone in the next room? a.sound waves can travel though solids. b.the waves travel from room to room via air. c.there must be some air in the wall so the sound can travel through it. d.sound waves change to electromagnetic waves and then back again.
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Chemistry, 23.06.2019 13:30
Did you mention that adding weight increased the pressure
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Chemistry, 23.06.2019 14:30
Among the elements of the main group the first ionization energy increases
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