A 100 kg bag of snickers bars is 4 m away from the center of a merry-go-round. The bag of snickers bars has a centripetal acceleration of 6 m/s2. What is the bag’s linear velocity?

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)