What can accurately be said about a resultant wave that displays both reinforcement and interference? a. molecules remain in their normal positions at spots of reinforcement. b. maximum interference occurs where the troughs of the two component waves are in phase. c. the crests of the two component waves are in phase where interference occurs in the resultant wave. d. the component waves have different frequencies.

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.