What formula is needed to calculate the acceleration of object in motion?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Which of the following are guidelines to follow for obtaining accurate observations

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)