Study the graph shown below it is a graph of velocity vs time. for kiera when she is riding her bicycle, what is her displacement during the first eight seconds a- 15.5 m

b- 20.5 m

c- 27.5 m

d- 30.5 m

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)