Using proper units is important when recording data. in this lab, you determined three properties of the objects: mass, volume, and density. what are the units for each property?
the units used for mass were .
the units used for volume were .
the units used for density were

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)