Which of the following statements about stopping twisting is NOT true?
A mostly occurs in individual sports
B. can result in ligament and tendon damage
C. is a movement required in most fast-paced sports
D. creates stress and strain on joints

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.