28.085v = 2.33 i wondering how that equals to v= 12.051 density = mass over volume
density= mass/volume

How do the energy differences between the higher energy levels of an atom compare with the energy difference between the lower energy level of the atom

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?