Can someone please answer number 2 for me .

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

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)

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?