Which of the following solid substances contains positive ions immersed in a sea of mobile electrons?

Your

O2

Cu

CuO

NO2

Does the energy in a solid increase or decrease when changing to a liquid?

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .